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....:)Quote:
Originally Posted by rhenry86
But, we're not done yet.
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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....:)Quote:
Originally Posted by rhenry86
But, we're not done yet.
well let us know, I made my first clippings this morning! I need a flower bulb in about a month for my closet!
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:
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)
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?
Nice stash Pimp! Wayyyyyyyy Nice! I'm gonna try the ceramic!!!:thumbsup:
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.
Quote:
Originally Posted by Dutch Pimp
Oh, by the way, beautiful results with your grow mate. :thumbsup:
Quote:
Originally Posted by Dutch Pimp
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:Quote:
Originally Posted by human8
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.
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.
Good work.....nice grow.
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
Hey Dutch,
Love the Widow Grow....nice work..thanks for all the info as well..
Peace,
Treetops :thumbsup:
does any1 know how much uv-b this thing (cmh bulb) throws off?...from what i understand to much uv-b is bad...
Quote:
Originally Posted by dextr0
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)
...[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
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...
I think you are right...too long OR too close...can cause light bleaching...:(Quote:
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
...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 , 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!
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:Quote:
Originally Posted by Swansen
I have two 400 watt CMH lights, now.
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
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.
Valentine harvest: flashback...:pimp:
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.Quote:
Originally Posted by potwarrior
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.Quote:
Originally Posted by Dutch Pimp
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
In the first pic you can see the yellow of 4000k CMH
new camera...new buds....:thumbsup:
time marches on...dual 400 CMH...:stoned:
Picture testing............13 weeks........then 14 weeks....................2% amber.....:wtf:
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:Quote:
Originally Posted by pushit
(Nirvana Northern Lights x Shiva)
:thumbsup: Very Nice man!
Happy New Year
Happy New Year to you!Quote:
Originally Posted by Dutch Pimp
Nice! I'd be more impressed if you had trained those monsters to say 2-0-1-3 though. :jointsmile:
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.