UVb an experiment

[Weezard]

Excellent!:thumbsup:
I'm in.
For a 730 nm. source, it's hard to beat Incandescent "black lights"
They put out a tiny bit of UVa and a relatively enormous amount of Far red.
They are cheap and available from Wallyworld.
Note that they emit considerable IR as well and the bulb gets very hot.
Might require more cooling.

Aloha and mahalo,
Wee zard

[mainegrown]

i have always wondered about those black lights.. but i read somewhere that they are only good for about 100 hrs and that is what like 9 days of flowering?? not a very cost effective way to hit em with 730 nm..
i may be wrong but thats what the GE site said..
~MG

[Weezard]

i have always wondered about those black lights.. but i read somewhere that they are only good for about 100 hrs and that is what like 9 days of flowering?? not a very cost effective way to hit em with 730 nm..
i may be wrong but thats what the GE site said..
~MG

I did not know that.
Thanks MG.

Makes sense.
They drive the filament hard to raise the color temperature to get some UV, then filter out most of the visible light which makes it run very hot.
Course you don't run the 730nm. source for more than 20 minutes before, and 20 minutes after the main lights.
(Leaving them on with the 660nm. is counter productive.
As I understand it, the 730nm. is a phytochrome toggle of sorts, not an energy source.)
That's still only 150 days on average.

I wonder if wiring 2 of 'em in series would solve several problems at once. Hmmmm...:detective1:

Need some way to measure the Far red output.
Any suggestions? anybody?
Don't be shy.

Logic tells me there will still be plenty of far red at a lower voltage but almost no UV and less than half the heat.
(2 X R. = .5 X A., and, since V. is also halved, the W. per bulb is X .25!)
The spectral "curve" of these pups is more like a steep ramp.
Got one somewhere. I'll try to find it for ya.
Ah! Here 'tis;
[attachment=o234818]

L8r
W.



This is going to be an informative test.

Aloha, Y'all

Weeze

[seventhchild]

I wonder if wiring 2 of 'em in series would solve several problems at once. Hmmmm...

or maybe a light dimmer? i'll put my meter on one today and see if the voltage lowers as i dim a bulb. but maybe an increase in voltage would be more productive in a regular INC or halagon ? your right need a way to measure far red

Course you don't run the 730nm. source for more than 20 minutes before, and 20 minutes after the main lights

. Dogznova runs his for 6 hours ?

[Weezard]

or maybe a light dimmer? i'll put my meter on one today and see if the voltage lowers as i dim a bulb.

You probably won't get a true RMS reading.
A 'scope is more informative.
Basically, a home kine dimmer changes the total power applied to the load by turning the current on sooner, or later in the 60Hz sine wave.
Kind of a crude pulse width modulator.

but maybe an increase in voltage would be more productive in a regular INC or halagon ?

It would be certain to shorten their useful life and raise the color temperature.

your right need a way to measure far red . Dogznova runs his for 6 hours ?

Dogznova does a lot of interesting things.
Sometimes I doesn't foller him.
An' so far, that has worked out well. - chewed-up Pogo quote.

Jus' ribbin' ya dogz.

Seriously, unless you are going full-on Rauber, you need to do some reading about 730nm. usage.
Google is your friend here.

If you come up dry, I have some info stashed somewhere in this terrabyte of arcane and disorganized information.

Hey, OM! Have you got any Far red info for 7.
I love the on-topicness of it. UV? FR? "alla same kine"

Aloha,
Wee.

[Weezard]

"Ditto"

[mainegrown]

hey weez i did some looking and i DO have the PAD manual...... but i dont have much/cant come up with much info on 730 nm light by itself.. :wtf:
maybe its just getting kinda late but i am stumped.. if you wanna send me some of that info i would love it man..
i only have like 300 mb of info on growing and a dozen or so hard copy books that my mom gave me but it can be so hard to find the RIGHT info in all that mess


i am very interested in playing with some cool flowering games soon.. i am thinking that using clones is the only way to go about it. i have the space/time/materials (at least most of 'em ) as well as the wish for some more info on how this fine plant grows, to go about some little experiments.. i was thinking that this would be a good use for a couple ounces of the herb..

i wonder what the 730 nm would do when backing up an LED array?? not only help to make it flower faster but to pack on more weight.. i have been thinking about some of the problems that are attributed to LED growing and people seem to find that it takes longer for the gurls to flower to completion.. would that be because the 660 nm liht has such a large time factor?? HPS is like 3.* but 660nm is like 5.5.. so.. any thoughts?
im winded and gotta smoke the bubbler but wish to hear what ya gotta say on this lil idea..
and again please hit me up to work out sending some info to me.. thanks
~MG

[Dogznova]

Remember... Black Lights are only used for the night time 730nm.. Clear Inc's are much better for day time 730.. Black lights or 730nm LED's are being used in the Martian Method's dark time...... Of course it's 17 to 20 hours of PAD darkness (depending on what cycle you want 12/12 11/13 or 10/14)....... Remember it's 1/2 hour on of 660nm then 1/2 hour on of Black lights or LED 730nm.

Here is an example... 17 hours of that combination of light 660/730 being cycled will give your plants the equivalent of 12 hours of darkness AND 5 hours of Day light. (Red 660/730 can do some strange things) Now take that 5 hours of day light that it gave you and add it to the 7 hours of 425-445nm/660nm (425nm blue dominant spectrum) and you have a 12/12 flower with aprox a 1.8 time factor using 24 hour of light...

WEEZ the reason I think that this info should be in this UV thread is.

That 660/730nm PAD light cycle from above..... Will out perform any UV-b bulb on the planet.. UV-B actually hurts the THC production not increases it.. UV-B IMO will increase trichomes.. But lots of trich don't mean lot's of THC ..I'm just saying.:thumbsup:

[potofgold]

great info here subscribed for sure. :thumbsup:

[seventhchild]

http://www.gelighting.com/na/busines...all/reveal.jpg