The Perfect Spectrum *Graphs*

[h4rk4t]

i want to buy this light http://cgi.ebay.com/Reptisun-5-0-UVB...QQcmdZViewItem buttt im not sure if its anygood.... what do you think guys?

[Spanishfly]

Thanks for that 2nd graph, runners. This is really interesting. I am sold, if I were an indoor grower I would have massed ranks of fluoros.

But I will stick to the sun, lots of it here, and it is free.

[h4rk4t]

Originally Posted by Spanishfly

Thanks for that 2nd graph, runners. This is really interesting. I am sold, if I were an indoor grower I would have massed ranks of fluoros.

But I will stick to the sun, lots of it here, and it is free.

lucky you heh, i have to move indoors for the winter and i have to stop uusing my heater lol damn that sucks now its like 58 degrees at night for them. heh cant wait for summmerrr freee bud.

[youngandstupid]

Is there a way to relate color temperature to nm? I know it may be a dumb question but I'm dumbfounded on how to figure it out.

[runner's high]

Originally Posted by youngandstupid

Is there a way to relate color temperature to nm?

I assume you're referring to "warm" and "cool" colors. Warm colors are simply more red and thus have a greater wavelength in nm whereas cool colors are more blue and thus have a lesser wavelength in nm. For instance, warm white is slightly red whereas cool white is slightly blue to the human eye. Despite the terminology this should not be mistaken for real temperature (the average kinetic energy of particles).

Originally Posted by spanishfly

But I will stick to the sun, lots of it here, and it is free.

Good choice. According to my graphs, sunlight is good.



After giving the stats another look I am pretty impressed with metal halide. Whereas HPS is only strong in the red MH looks pretty strong in both. Coupling MH with red fluoros should make for a balanced grow if you doubt fluoros' ability to stand alone.

[youngandstupid]

That's sort of what I meant, but I meant like a direct conversion from a color temperature of 2400K to ____ nm. I know that in weed likes 2200-2700K for flowering (so that's warm or red) and 5500-6200K for vegging (cool or blue). I just dunno if there is a conversion.

[Dan42nepa]

But watching the MR green video, I have two sets of 4 foot shop lights each with a warm white and cool white bulb (4 bulbs) suspended over a table. I plan on using this setup for very young plants, seedlings and clones and then move them into my grow area with a 400 w metal halide bulb.
I have read everything I can find on this and other sites and have 3 NL seedings under the fluros now. If they die after all my prior germination issues I will be pissed.
I think I will eventually ween them onto the 400 watt lights a few hours at a time when they get about 6-8 inches.
Anyone see any problems with this?


Dan

[h4rk4t]

i found out UVb even though it creates more trichomes....it kills thc....so i think im just going to pass on the uvb light for now heh untill i wanna get some mellow smoking bud filled with trichs heh would help impress allota buddys

[reasoner22]

+rep,runner.
but what exactly do u mean ...red/blue flouros
i have 80w 6500k & 69w 2700k.
may get 315w 4100k to start, maybe uvb, maybe led, maybe more cfls of 2700k+6500k.
for 8 sq ft grow.
i cant relate the graphs to k#s,exactly, tho i think ive got the concept.
ty

[runner's high]

People have been asking about color temperature (K) and Wikipedia is smarter than I am:

http://en.wikipedia.org/wiki/Color_temperature

Originally Posted by reasoner22

but what exactly do u mean ...red/blue flouros

Philips red fluorescent tube (TLD 36W/15) and Philips blue fluorescent tube (Philips TLD 36W/18), but I imagine similar red/blue fluoros would also work well. I'm not sure where they are sold; I couldn't find them on Philips' website.

Originally Posted by h4rk4t

i found out UVb even though it creates more trichomes....it kills thc

Interesting, where'd you hear that? Hmm. Even if that is true, you might be able to work around it. Maybe you could expose the plant to UV-B for the first few weeks to stimulate trichome growth and then scale it back when the trichomes (and the THC) actually start coming in. ...Just thinking out loud.

This thread needs a UV-B expert.

[h4rk4t]

this one dude on this other forum i go to told me that (infinit is his name, the site is cannabishq.com) but ya he told me he has had alot of expierience with that stuff and said even though it will just ocmpletely make your bud look like snow lol (mouthwatering), it does some how depleet (spelling???) thc levels. But i bet its possible to not distort the thc by doing just what you were saying, i had that sime idea....like start off with 30 min of light from it and increase it 10 min each day till you get to 2 hours...... then just start lowering it back down again till its barely ever on at all. like what you said, to stimulate their growth at an early stage. good idea man. i've been trying to come up with some idea's not jsut for trichome growth but just over all bud production and plant vigor.... im not gonna say whatt they are cuz i wanna patent them at some point in the future hah but it has to do with heating up their root system since roots grow faster with heat which would lead to larger root system which = larger plant = larger buds = biggger yeild.... my original idea was to use a heating matt and wrap it around the bucket....but figured out a way with water........
peace brotha

[TechnoMage]

Originally Posted by chimera

runner you still don't get it, flouros do not have the ability to penetrate. MJ she be a big girl and likes her light all the way to her feet inside and out and the uv thing, I like my buds sugary don't you, trichomes are the plants protection against uv. uv good.

That's what side lighting is for. I'm running 22,400 lumens at 256 watts for side lighting and another 14,400 lumens at 165 watts of canopy lighting.

Not the best for every situation but works very well for me.
1. No heat issues
2. Limited space (cab is only 30"x19")
3. I can keep the canopy only a few inches off the top

[Francious70]

Question to OP. What program are you using to make these graphs?? And would it be possible to put all four of these bulbs on a graph for me?

http://www.superbrightleds.com/leds.htm

Part #'s
RL5-B551
RL5-UV2030
RL5-R5015
RL5-R2415

[calinycgrow]

In terms of veg lighting, i dont really see a huge advantage of MH over flouros, but once flowering starts theres no debate that a HPS will outgrow CFLs or LEDs. Even if you have lots of wasted light with HPS, there are a lot more lumens going to the plants w/ a HPS than any CFL

[CFLdorm]

UV rays are not bad for plants ;/ In fact, you'll get better weed if you put a UV light on 2 hours a day, to develop cannabinoid protection for UV rays (more highness!). Too much is bad though, yeah.