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Dutch Pimp
09-13-2007, 05:21 PM
Phlips MasterColor Ceramic Metal Halide ~ CMH ~ HPS-Retro White (http://advancedtechlighting.com/cdmed18.htm)

OK..techies...what does everyone think about this bulb?

rhizome
09-13-2007, 07:57 PM
Not a huge fan of any conversion bulb, as the cost of use after a single replacement would generally cover the ballast that you're not buying.

I'm not familiar w/ this bulb in vivo, so I can't be more specific. (What's up with the spike @520-530 nm? Lot of power at not-so-great wavelengths...)

Dutch Pimp
09-13-2007, 09:08 PM
Well..I am a big fan of hortilux bulbs. I have a 400 HPS Hortilux that did very well for me. But on my next grow, I was thinking about a conversion bulb....:silly:

The spectrum wavelengths on this bulb appear to be superior to both Hortilux or Son Gro. This is just a "thinking" exercise on my part, getting ready for my next grow. I will stick with my 400HPS ballast, no matter what. I'm just on the lookout for the BEST bulb on the market. Price is no object, but $53+tax seems a bargain.

I've paid a LOT more for things in my life, and gotten a LOT less, if you know what I mean...:thumbsup: Just looking for the most bang for the buck...:pimp:

Dutch Pimp
09-13-2007, 09:35 PM
What's not to like?...comparison wise?

CMH vs. standard HPS vs. Son Agro 430 vs. Hortilux MH conversion bulbs.

rhizome
09-14-2007, 01:03 AM
Again- I'm not familiar w/ this bulb in practice- I'm working from the spec graphs, and my experiance w/ conversion bulbs. For all I know it's a winner.

Most of the conversion bulbs that I've been around lost brilliance fairly quickly, and were relatively expensive. ($53 is a VERY good price for a 400w conversion- I'd def give one a shot.)

Replacing bulbs annually, if yer burning a good ag bulb, should run you about $100 per annum. If this conversion only lasts 6 months, it's gonna cost you $106+tax per annum. 400w conversions are often $100+, which puts cost per annum ( replacing every six months) up over two hundred bucks- prohibitive, to me.

In terms of the bulb, that spec graph looks to me like it's tossing a lot of energy in the 530-540nm range.

If you want the best, in my opinion that'd be the Hortilux Blue- but that's gonna require a MH compatible ballast. This may be a workable option.

Dutch Pimp
09-14-2007, 01:47 AM
I appreciate your input rhizome...:thumbsup:

I was wondering about that spike at 520-530 nm too...it must useful for something...tanning maybe?...:D

Some dude at ICMag put me on this...claims to have used it for years. I asked about that spike...waiting on his answer.

Bottom line: I think I will get one. Nothing ventured, nothing gained...:stoned:

Dutch Pimp
09-14-2007, 02:50 PM
One update on these Ceramic Metal Halide bulbs...they are NOT to be used with Digital Ballasts!

rhizome
09-14-2007, 03:06 PM
Not from personal experiance, I hope...

Dutch Pimp
09-14-2007, 05:12 PM
Not from personal experiance, I hope...

...no ...it's just the techie rap...from some dude at ICMag that has been using them. I have a heavy duty 400 HPS magnetic ballast. The check is in the mail...so to speak. Will let y'all know how it works...in a few months.....:weedpoke:

khronik
09-14-2007, 10:47 PM
Well, it's clearly designed for industrial lighting, not horticulture use, and that large spike in the middle of the green spectrum will probably be wasted. It looks like a HPS/MH combo light, which could be great for vegging. The life is only 20,000 hours which is similar to typical MH bulb life. When it says the lumen maintenance is 85%, that probably means you'll get 85% of your initial lumens at half the bulb's rated life. I've seen other representations of lumen maintenance, but the % of initial lumens at 50% life is the most common. Also, lumens are about the same as a typical MH non-conversion bulb, so that's pretty good.

If you're familiar with regular MH bulbs, this looks like it'd work a lot like they do, but with a broader spectrum and in a HPS ballast. And because it's designed for industrial use, the low price probably has more to do with economy of scale than quality. Go for it! :)

Skrappie
09-15-2007, 01:00 PM
Iā??m glad you mentioned this Dutch, as today is the day I go HPS, and I was really wondering about conversion bulbs. I hope my local hydro shop carries something similar to these; it does not seem to be a bad idea to get the most bang out of your ballast buck. :)

rhizome
09-15-2007, 01:05 PM
it does not seem to be a bad idea to get the most bang out of your ballast buck. :)

Go for the switchable, if you haven't already purchased.

Dutch Pimp
09-15-2007, 02:04 PM
Go for the switchable, if you haven't already purchased.

I agree.

Thanks for the input...everyone.....:thumbsup:

the image reaper
10-13-2007, 11:54 PM
I just ordered two EYE 400-watt MH Conversion lamps (4500 K, 37,500 initial lumens), for $35 a pop from '1000 Bulbs' ... as you know, they are made to ignite with a HPS ballast ... but, one thing I couldn't find in my research, should I expect it to burn much hotter than the present regular Sodiums ? ... :smokin:

growbe
10-14-2007, 03:18 PM
Clearly, it is one of the best 400 watt bulbs on the market for vegging a plant. It is even better then the eye blue which I have. And with that wide of a spectrum, it is a great bulb to flower a plant as well. And the price and lumen maintenance can not be beat! So if you have a 400 watt hps ballast then this bulb is the ticket all the way through the first 3 weeks of flower. And if you are tight on funds then flowering with this bulb will work great as well. I have one now, and it will replace my eye blue for my next grow.
53 bucks! I'm going to buy even more before they catch on and start marketing as a grow bulb which will inturn double the price.

Dutch Pimp
10-14-2007, 07:43 PM
Will veg 4 seedlings with the 400CMH...starting in a few days.

Dutch Pimp
10-19-2007, 05:50 PM
Day #1 CMH bulb. 4 White Widow seedlings, one week old. Temp?...about the same as the 400HPS Hortilux...or 1-2 degrees lower....:greenthumb:

Dutch Pimp
10-27-2007, 02:58 PM
End of week #2. 3 WW seedlings. They have been under the CMH bulb for 1 week, so far, so good. No stretch, less heat than the HPS hortilux.

MaryLane
10-28-2007, 05:46 AM
I'm watching this one. I'm very interested in these CMH bulbs as well. Got any pics Dutch? How do they seem to be comparing to your other grows so far?

Dutch Pimp
10-31-2007, 04:36 PM
I'm watching this one. I'm very interested in these CMH bulbs as well. Got any pics Dutch? How do they seem to be comparing to your other grows so far?
Coming up on the end of week #3. Three WW seedlings.

Sorry about no pics. No camera. ...I will try to explain..if this CMH 400 bulb is better than a 400 HPS Hortilux bulb. That will take a lot of doing...because the Hortilux bulb is great.

The plants are doing great...10 inches tall...and a mind of their own...the little shits....:wtf:

MaryLane
10-31-2007, 05:52 PM
I understand! :)

I guess you haven't got enough time on the CMH to really compare it to the Hortilux.

Whaddya mean 'a mind of their own'? :jointsmile:


Coming up on the end of week #3. Three WW seedlings.

Sorry about no pics. No camera. ...I will try to explain..if this CMH 400 bulb is better than a 400 HPS Hortilux bulb. That will take a lot of doing...because the Hortilux bulb is great.

The plants are doing great...10 inches tall...and a mind of their own...the little shits....:wtf:

Dutch Pimp
10-31-2007, 06:11 PM
I understand! :)

I guess you haven't got enough time on the CMH to really compare it to the Hortilux.

Whaddya mean 'a mind of their own'? :jointsmile:
...you know how it is...the shortest plant wants to leaf burn...the tallest plant wants to nute burn...the middle plant likes everything just the way it is.....:)

Dutch Pimp
11-04-2007, 03:35 PM
3 WW plants at the end of week #3. All three plants were 98% root bound in 6 inch pots, so I transplanted them into 10 inch pots, Friday. About 10-12 inches tall, I sniped the top off the tallest one to get them even.

Will start flowering cycle, next Friday. So far, I can tell that the CMH bulb, does NOT throw the heat down, like an HPS bulb does. I can get it much closer to plants; with out leaf burn, IF you wait until week #2 or 3.....enjoy.

MaryLane
11-04-2007, 09:04 PM
Nice update. How is the node spacing?

The real test will come during flowering!

Get a camera ya noob! :D


3 WW plants at the end of week #3. All three plants were 98% root bound in 6 inch pots, so I transplanted them into 10 inch pots, Friday. About 10-12 inches tall, I sniped the top off the tallest one to get them even.

Will start flowering cycle, next Friday. So far, I can tell that the CMH bulb, does NOT throw the heat down, like an HPS bulb does. I can get it much closer to plants; with out leaf burn, IF you wait until week #2 or 3.....enjoy.

Dutch Pimp
11-08-2007, 05:07 PM
Nice update. How is the node spacing?

The real test will come during flowering!

Get a camera ya noob! :D
No need to wait any longer. One of the plants has already shown it's female pre-flower, 27 days veg from seed sprout! Very bushy, 13 inches tall. Nodes?..if you count them like I do..8-9.

So, 12/12 starts today.

I don't know yet how it will do for flowering...but it's a killer bulb for veg, if you have a 400 HPS magnetic ballast.

I don't usually hand out recommendations, unless I have tried it...at $53 + $10 for shipping...it's a bargain.

MaryLane
11-08-2007, 09:14 PM
Nice, I think, by your posts, you are the same person in the ICMag thread about CMH bulbs. :)


No need to wait any longer. One of the plants has already shown it's female pre-flower, 27 days veg from seed sprout! Very bushy, 13 inches tall. Nodes?..if you count them like I do..8-9.

So, 12/12 starts today.

I don't know yet how it will do for flowering...but it's a killer bulb for veg, if you have a 400 HPS magnetic ballast.

I don't usually hand out recommendations, unless I have tried it...at $53 + $10 for shipping...it's a bargain.

Dutch Pimp
11-08-2007, 09:37 PM
Nice, I think, by your posts, you are the same person in the ICMag thread about CMH bulbs. :)
You guessed it...I grow like Clark Kent......:greenthumb:

MaryLane
11-09-2007, 12:34 AM
Overgrow the government! You rock my friend, keep growing!


You guessed it...I grow like Clark Kent......:greenthumb:

Dutch Pimp
11-16-2007, 04:53 PM
End of week #1 flowering. 3 WW plants, 2 female, 1 male. All are about 2 feet tall and looking good. (I have 2 bag seed plants trailing along behind; 3rd week of veg for them). It's only been 1 week of flowering; so still too early to compare 400CMH bulb to 400HPS Hortilux for flowering, but I think I can say; no major difference, yet. And I consider that a Good thing....:)

Now, for the hijack question?...for anybody cruising though.

I am thinking about putting the male in a separate room, and using the pollen to make seeds (one 1 female), for the future grows. At 2 feet tall and very healthy: what would the minimun light requirements be to keep it growing well enough to make pollen?

All input welcome....:thumbsup:

I guess I would have to go out and buy something; I only have 4 foot floro tubes now...:(...and want to keep it to the minimun possible.

MaryLane
11-17-2007, 09:30 AM
Hey Dutch how much heat is your lamp giving off? Is it aircooled? How far can you keep it from your plants?

Dutch Pimp
11-17-2007, 03:07 PM
Hey Dutch how much heat is your lamp giving off? Is it aircooled? How far can you keep it from your plants?
1. My setup is in a closet. I pump cool air between the top of the plants and the bottom of the light, 24/7. The air comes from my central heat/ac floor opening, using 6 inch dryer-duct hose. If it gets cold at night, it adds heat. I don't have an exhaust system, it's not nessary in the fall/winter/spring, and I don't try to grow in the summer. The excess heat returns to the H/AC system. I maintain 70-85 degrees and 40-50% humidity.

2. The CMH bulb doesn't throw the heat down like the HPS hortilux bulb. So I can get it closer; say 8-10 inches as opposed to 12-15 for the hortilux. If I hooked up an exhaust system to my lamp housing, I could maybe get closer still. It was an option, I didn't get....:(....should have.

This works great for my small personal grows....:D

MaryLane
11-18-2007, 12:46 AM
Ahh cool. Sounds like a nice set up.

I am trying to decide if I want to throw my CMH 400w in a DIY bake a round cooltube or leave it open. I am doing a barrel style vscrog so the distance to the plants is fixed. Right now I am planning on a 20" diameter screen, which puts the radius at 10". I think I amy do the cooltube and reduce the diameter to maybe 18" or so.

What do you think? I will have plenty of ventilation either way, and my ambients never go above 75F, usually staying around 71F.




1. My setup is in a closet. I pump cool air between the top of the plants and the bottom of the light, 24/7. The air comes from my central heat/ac floor opening, using 6 inch dryer-duct hose. If it gets cold at night, it adds heat. I don't have an exhaust system, it's not nessary in the fall/winter/spring, and I don't try to grow in the summer. The excess heat returns to the H/AC system. I maintain 70-85 degrees and 40-50% humidity.

2. The CMH bulb doesn't throw the heat down like the HPS hortilux bulb. So I can get it closer; say 8-10 inches as opposed to 12-15 for the hortilux. If I hooked up an exhaust system to my lamp housing, I could maybe get closer still. It was an option, I didn't get....:(....should have.

This works great for my small personal grows....:D

Dutch Pimp
11-18-2007, 02:06 AM
Ahh cool. Sounds like a nice set up.

I am trying to decide if I want to throw my CMH 400w in a DIY bake a round cooltube or leave it open. I am doing a barrel style vscrog so the distance to the plants is fixed. Right now I am planning on a 20" diameter screen, which puts the radius at 10". I think I amy do the cooltube and reduce the diameter to maybe 18" or so.

What do you think? I will have plenty of ventilation either way, and my ambients never go above 75F, usually staying around 71F.
Hi.

I'm not a light expert or anything, but these bulbs are rated for open fixtures. They have X-amount of Uv block built into the glass bulb. If you need to use a cool tube, select the proper kind of glass tube or you will block too much of the Uv light; which the plants love.

A fixed light distance; is a over-my-head growing style. I adjust my light distance daily...:D...and scrog is too.:) I just let them puppies grow. I have plenty of height distance to work with.

Bottomline: Everbody's grow room is different, so I usually avoid giving advice, but the key is to test everything in advance, I think. Keep temps between light and top of plants around 75-80 degrees; with good air circulation, that is good common advice....enjoy!

Dutch Pimp
12-07-2007, 04:25 AM
The thread about MH in flowering, reminded me that I am at the end of 4 weeks of flowering with the CMH bulb.

2 female white widows under a 400 CMH bulb. Still don't have a digital camera, but went shopping for one today. Maybe after the weekend, I will have some pics available.

Anyways, their 3 foot tall and doing very well. Which is about a foot shorter than the last grow under a 400 HPS Hortilux, everything else is the same; nutes, etc.

I like this bulb.

Indico
12-07-2007, 04:33 AM
I'm really thinking of getting just an HPS ballast with a CMH bulb, if I have any doubt about CMH it's in the flowering stage, so let us know how much you got, peace.

Dutch Pimp
12-07-2007, 04:54 AM
I'm really thinking of getting just an HPS ballast with a CMH bulb, if I have any doubt about CMH it's in the flowering stage, so let us know how much you got, peace.
Yea...that's the $63 question. How does it do in flowering? It does great for 4 weeks. The final 4-5 weeks?...we'll see.

Remember...the CMH bulbs are NOT to be used with digital ballasts...magnetic ballasts only.

Dutch Pimp
12-11-2007, 07:19 AM
Exhibit A. 4 1/2 weeks flowering...(I really should finish painting the walls...:stoned:)

rhenry86
12-15-2007, 09:12 AM
i noticed that you are warning the use of e-ballasts, so I have been lookin around and came up on this

http://www.hydro-techn.com/showcandle/newscan.html

I feel that this bulb will produce more yeald per watt, no? Is your progress anything above average?

Dutch Pimp
12-25-2007, 03:54 AM
Exhibit B...end of 7 weeks flowering.

rhenry86
12-30-2007, 10:53 PM
so is this better than a hortilux?

Dutch Pimp
12-30-2007, 11:16 PM
so is this better than a hortilux?
Well....it runs cooler than a hortilux, costs half as much, reduces stretch by about a foot. Other than that, it's about the same....:)

But, we're not done yet.

rhenry86
01-08-2008, 06:37 AM
well let us know, I made my first clippings this morning! I need a flower bulb in about a month for my closet!

Dutch Pimp
01-10-2008, 05:15 PM
Bored...playing with the camera. Waiting for amber trichs...damn colas still growing. The plants got low on mag, 2 weeks ago, soon as I added epsom salt, the colas started growing again...:cool:

zero0ne
01-14-2008, 11:49 PM
i hate to post links to other crow based forums, but ICMAG has a HUGE thread going on about these lights, its something like 20 pages long...

they look to be MUCH better for flowering and vegging than any other 400W bulb you can get.

******just remember that you CANNOT use these bulbs in a digital ballast!!!!!!!!!********

International Cannagraphic Magazine Forums - Ceramic Metal Halide (CMH) (http://www.icmag.com/ic/showthread.php?t=72215&highlight=CMH)

Dutch Pimp
02-16-2008, 04:54 PM
Well...my 400 CMH bulb grow is over. It grows good weed! Two white widow plants....zero effort.

I have my choice for my next grow, of choosing my Hortilux HPS blub or my CMH bulb....I think I will stick with the CMH bulb.

ps...Mary Lane...if your're out there...how's your bulb/grow doing?

GaGrown
02-16-2008, 06:14 PM
Nice stash Pimp! Wayyyyyyyy Nice! I'm gonna try the ceramic!!!:thumbsup:

MaryLane
02-16-2008, 07:15 PM
It's my first grow, so I've made some mistakes (including not picking the healthiest clones to start with), but I think my girls are improving. I pretty much had to prune off almost all of the growth that the clones had when I got them. They were overwatered and had deficiency and pH issues from when the dispensary was taking care of them. I've corrected most of that, and the growth is really tight so far with the 400w CMH. :) The node spacing is around 1cm. I have it about 16" from the lamp right now and am going to move it closer soon.





ps...Mary Lane...if your're out there...how's your bulb/grow doing?

MaryLane
02-16-2008, 07:16 PM
Oh, by the way, beautiful results with your grow mate. :thumbsup:


Well...my 400 CMH bulb grow is over. It grows good weed! Two white widow plants....zero effort.

I have my choice for my next grow, of choosing my Hortilux HPS blub or my CMH bulb....I think I will stick with the CMH bulb.

ps...Mary Lane...if your're out there...how's your bulb/grow doing?

human8
02-18-2008, 08:38 AM
Yo Dutch Pimp! Did you get any blisters from that pup? I heard
it throws some hella UVA and UVB up so close, did ya wear a long sleever while in the room? Nice thread, I'm thinking these
are the way to go for the dough. Thanks Dutch Pimp!

Dutch Pimp
02-18-2008, 02:29 PM
Yo Dutch Pimp! Did you get any blisters from that pup? I heard
it throws some hella UVA and UVB up so close, did ya wear a long sleever while in the room? Nice thread, I'm thinking these
are the way to go for the dough. Thanks Dutch Pimp!
It must throw down some strong UV rays...because I was rotating plants with the light on and developed a rash/burn on my knuckles. First my right hand; (didn't know what it was, causing it)...then I switched hands and got rash on left hand knuckles...:(...bottomline: don't stick your hands into the light....:smokin:

Anyways...I think most MH bulbs throw down serious UV rays, that's why many are rated for inclosed fixtures only. To block excess UV rays. This bulb is rated for open fixtures and has SOME UV block built into the glass bulb...but not much.

MaryLane
02-19-2008, 05:26 AM
You can definitely tell that the CMH emits more UV just by putting any part of your skin near the lamp. I'm fairly dark-skinned and can still tell. If you're really pale I'd suggest using caution around the lamp.

All that said, the plants love it, and that's ultimately what we're using the light for. Just use common sense with the lamp and all should be well.

johnny5fingers
05-01-2008, 02:10 AM
Good work.....nice grow.

Dogznova
05-05-2008, 12:15 AM
This is a CMH for you digital and electronic ballasts users.......

Life Light Tech Sun Pulse 400W Pulse Start Metal Halide 4K These lamps have also been designed to work with electronic and digital ballasts. They won't destroy electronic ballast or be destroyed themselves. These pulse start lamps were created to withstand the 4khz pulse that electronic ballasts use to ignite lamps,(this is what destroys standard MH lamps) only HPS grow lamps can handle this type of ignition process. Because our new Sun Pulse lamps are designed to withstand 4-6 kHz pulses, you will experience long and even lamp life approx (20,000 hrs) with little color shift or loss of FT-CD output. Special Features: Won't Damage Electronic or Digital Ballast Elliptical shaped arc tube for better distribution of light Long Lamp life Low color shift .


Google.... Life Light Tech Sun Pulse 400W Pulse Start Metal Halide 4K

Treetops
04-02-2009, 02:39 PM
Hey Dutch,
Love the Widow Grow....nice work..thanks for all the info as well..

Peace,
Treetops :thumbsup:

dextr0
11-14-2009, 05:37 AM
does any1 know how much uv-b this thing (cmh bulb) throws off?...from what i understand to much uv-b is bad...

Dutch Pimp
11-14-2009, 05:52 AM
does any1 know how much uv-b this thing (cmh bulb) throws off?...from what i understand to much uv-b is bad...


it throws off enough to burn my knuckles, when rotating the plants, once a day
...(which takes about 45 seconds)(most MH bulbs will throw off UV rays)

dextr0
11-15-2009, 05:23 AM
...[N: damn, I got a sunburn from these lamps! Exposition was around 7-10 minutes and I get the back of my neck and right hand hot!...G: n terms of the Aquamedic, how close were you to the lamp when you were burned? I assume worse would happen if you placed your hand in front of a zoo UV-b lamp at the same distance. If you looked at a zoo lamp (within a certain distance) I bet you would go blind. At 20" the Osram emits more UV-b than would ever reach the face of the Earth. You would only find that irradiance (photons hitting a target, ie. you) if you were about 9k-10k feet (more than 3k meters) up a mountain in mid summer at noon near the equator. Repite.com (MegaRay) will not sell the zoo lamp unless one owns a UV-b meter, works at a zoo, or is trained in the lamps use.It seems like the Aquamedic lamp is more broad spectrum into UV-a and PAR, yes? That would be good to add to a grow, but I doubt it offers enough UV-b. Well, let me rephrase that. I doubt it will emit the 'ideal' level of UV-b: 375 uW/cm^2. But, the Aquamedic may emit over 140 uW/cm^2 which is what I consider to be the lowest level of UV-b irradiance one would want to use to supplement their garden. I would have to look at the lamp, but I doubt there are UV-b readings available. Do you know of any such readings?...N: About half a foot]....i have been doing lots of "research" on bulbs lately. i am really intrested in cmh's and believe they are very prommissing but, if we are going to b growing with something its our responsability to look into certain things and make sure we dont harm ourselves or others (power of suggestion)...if the ub-b levels on the aquamedic lights are so high and it took 7 to 10 min...well how much uv-b are these new cmh bulbs emitting?? something to look into....imho

dextr0
11-15-2009, 09:34 AM
and as for your plants....[...G: Interestingly, research has shown that cannabinoid precursor (I forget which it is CB?) conversion into THC most likely happens with most efficiency, and hence, highest conversion into THC, between 280-290nm.[1] Even zoo lamp UV-b bulbs do not emit much irradiance in that short of a wavelength (aka nano-meter; which is the "length" of one "wave")...The trick to supplementing UV-b is short increments. In Nature the highest irradiance of UV-b is from about 11am to 3pm, four hours. We should try to emulate that time frame indoors. In all the studies I have read the researchers never used more than four hours per day-length of photoperiod. And most supplied UV-b post-solar noon. I am adding UV-b for two hours starting one hour after solar-noon (after 'midday' of day-length). Supplying more UV-b than four hours can injure plants, less is more in my opinion (to an extent).]...so like i said something to look into...sorry 4 double posting...

Dutch Pimp
01-29-2010, 02:56 PM
Supplying more UV-b than four hours can injure plants, less is more in my opinion (to an extent).]...so like i said something to look into

I think you are right...too long OR too close...can cause light bleaching...:(

CovertCarpenter
06-19-2010, 08:53 PM
...of information!

My :twocents:x3:

I have a Sunm4st3r Super MH Cool Deluxe 600w that suffered premature failure on my Lum4t3k 600w digital ballast (and was replaced by my fave d00ds @ Grown Hydro (http://www.grownhydro.com/) , love 'em!)... just wondering if it might have been due to the spike thingy that someone mentioned earlier, or if I just got a lemon bulb @first? I have heard that L. makes an adapter thingy that might help ameliorate this effect, but not heard much commentry.

This particular bulb/ballast combo is recommended by the distributor in my area, but they might not be aware of the problem. The bulb itself has a great spectrum, and was insanely good for veg (as well as tanning!). Am thinking of trying the bulbs that L-tek puts out next time I buy one, but the Life Light Tech bulb sounds kuul... can't seem to find the Lmtk ones in 600w :wtf:

The Uv-B thing, as well as the max exposure thing are great! This confirms something I've suspected for a bit, that the plant likes (and NEEDS!) a bit o' noonday sun, but doesn't wanna overdo it :D I'm just using killa fans rather than a cooltube @the mo, and the plants seem happier now that the bulb itself is an average 14" from 'em.

OMG, just noticed the time--have to go home and prep some water for the goils tonight!

Kudos to all wonderful informative posters here!

Swansen
11-18-2010, 11:41 PM
i know this is over a year old, but Dutch, how did your grow end up?? as far as vs your HPS runs.??

Dutch Pimp
11-19-2010, 12:21 AM
i know this is over a year old, but Dutch, how did your grow end up?? as far as vs your HPS runs.??

I've been using 400 watt CMH for 3 years, now. I still have my HPS bulbs if I need them..:thumbsup:

I have two 400 watt CMH lights, now.

Dutch Pimp
11-19-2010, 04:26 PM
Looks like I will need one of those HPS lamps after all. My newest CMH bulb failed after 2 months...:wtf:..the other one is 3 years old.

http://www.eyehortilux.com/EQS-N-52-46-00002.pdf

Dutch Pimp
02-05-2011, 05:10 PM
The last post by me was the Halloween harvest...:)

Now: the Valentine harvest; before the cut.

The first pic is at 8 weeks flowering..:wtf:..the HPS light wasn't cutting the mustard. So...back to all CMH light the last 2 weeks of flowering. Only water & a little molasses, added.

The second pic is at 10 weeks. In my opinion: 4000k in MH or CMH lighting works very well in closets.

Dutch Pimp
02-05-2011, 05:23 PM
Valentine harvest: flashback...:pimp:

potwarrior
06-18-2011, 07:41 AM
i have a couple of q's

1. i use a 400watt cmh and was wondering, dutch pimp, if your buds are airy?

im on my 2nd tent grow (og kush in DWC) w/ the cmh but my 1st grow, white widow in soil (fox farm) the buds were really airy.

2. i read some where that its not good to use mylar because it absords (or something) some of the infrared rays or something and cmh users should stick w/ white, is that true?

3. how do i prevent the burns i get on my girls? it looks like yours, dutch, i have lots of crispy, burnt leaves too?

4. i got the "enclosed" cmh bulb is it good or should i get an "open fixture" bulb? what kind of glass do i use, mine only says tempered.

5. i also read that its a good idea to throw in a uv bulb in the grow to, is this also true and if so which one uva or uvb?


thank you

Dutch Pimp
06-18-2011, 02:17 PM
i have a couple of q's

1. i use a 400watt cmh and was wondering, dutch pimp, if your buds are airy?

im on my 2nd tent grow (og kush in DWC) w/ the cmh but my 1st grow, white widow in soil (fox farm) the buds were really airy.

2. i read some where that its not good to use mylar because it absords (or something) some of the infrared rays or something and cmh users should stick w/ white, is that true?

3. how do i prevent the burns i get on my girls? it looks like yours, dutch, i have lots of crispy, burnt leaves too?

4. i got the "enclosed" cmh bulb is it good or should i get an "open fixture" bulb? what kind of glass do i use, mine only says tempered.

5. i also read that its a good idea to throw in a uv bulb in the grow to, is this also true and if so which one uva or uvb?


thank you

1. No ...I have no airy bud problem. It's either a strain problem or a growing method problem. I do soil only.

2. Mylar reflects heat. Flat white paint is better.

3. It's not usual for bottom WW leaves to turn yellow & die off. I keep the light about 15 inches above the canopy. You have to watch for burning on the top canopy; no matter what bulb you use. To far away is better than too close.

4. All Philips CMH bulbs are rated for 'open fixtures'. I run an open fixture. Is your bulb a Philips Retro-White CMH bulb?

5. Philips CMH bulbs have all the UV you need. Probably; too much UV if it's too close to the plant tops.

potwarrior
06-19-2011, 09:26 AM
1. No ...I have no airy bud problem. It's either a strain problem or a growing method problem. I do soil only.

2. Mylar reflects heat. Flat white paint is better.

3. It's not usual for bottom WW leaves to turn yellow & die off. I keep the light about 15 inches above the canopy. You have to watch for burning on the top canopy; no matter what bulb you use. To far away is better than too close.

4. All Philips CMH bulbs are rated for 'open fixtures'. I run an open fixture. Is your bulb a Philips Retro-White CMH bulb?

5. Philips CMH bulbs have all the UV you need. Probably; too much UV if it's too close to the plant tops.

sorry it is an "open fixture" philips cmh.

also, how much did you yield? my current grow (round 2) i only have 3 girls, probably gunna do scrog, and i was wondering how much wet and dry weight i can expect per plant under 1 400watt cmh.


thank you,
PW

Dutch Pimp
07-10-2011, 06:24 PM
In the first pic you can see the yellow of 4000k CMH


new camera...new buds....:thumbsup:

Dutch Pimp
07-30-2011, 04:16 PM
time marches on...dual 400 CMH...:stoned:

Dutch Pimp
11-05-2011, 02:21 PM
Picture testing............13 weeks........then 14 weeks....................2% amber.....:wtf:

pushit
10-27-2012, 10:26 PM
Another year gone by. Hey Dutch, you still using the CMH with great results? Almost that time to switch the grow room up again and was thinking about going that route instead of mh/conversion for veg. I love bringing up old great threads!

Dutch Pimp
11-01-2012, 12:47 AM
Another year gone by. Hey Dutch, you still using the CMH with great results? Almost that time to switch the grow room up again and was thinking about going that route instead of mh/conversion for veg. I love bringing up old great threads!

Yeah...still using dual 400 watt CMH lamps :thumbsup:

(Nirvana Northern Lights x Shiva)

pushit
11-01-2012, 12:58 AM
:thumbsup: Very Nice man!

Dutch Pimp
01-01-2013, 05:48 PM
Happy New Year

EvilCartman
01-01-2013, 06:34 PM
Happy New Year

Happy New Year to you!

Nice! I'd be more impressed if you had trained those monsters to say 2-0-1-3 though. :jointsmile:

Dutch Pimp
04-04-2013, 02:32 PM
Philips has announced they are discontinuing the 250/400 watt Retro-White CMH bulbs.

Supplier inventory is ok for now? I just got two more bulbs delivered.