LED grow lights... input please.

[ohyesplease]

7:1:1...red(630nm) Blue(460nm) Orange(610nm)

try these

[Handypants]

7:1:1

But go 660nm for the red:

Both of LED bulbs with 660nm and 630nm wavelength give red color, but LED 660nm bulb shows brighter than 630, also it is more expensive than 630nm .

I have just one female but my UFO has her in full flower at just under six foot tall.

No heat, no spike in electric bill.

I got my UFO (just bought a second one) from sun light sheds for about 2 bills.

As far as I can tell - worth every penny.

[lava88]

Hey folks,
I have one of the T1 smartlamps and one of the lumigrow lamps. both are 600 watts and have all the spectrums of light. I just finished my first grow. what I got was very good considering that my mentor did'nt but thats another chapter. I have noticed that your water use will be less that 1/2 of what you'd expect due to the lack of heat!!!! I also like the fact that they only use about 6$ worth of elec a month. With the lack of need for cooling and repacing bulbs ect in my opinion this is definately the way to go! cool quiet economical whats not to like? nothing technical here just the fact that I used them and I like them
g

[SupraSPL]

Someone posted (Weezard I think) that it takes a few extra weeks to finish them when using LED. Considering what you said about watering (and I have heard many others say) we could add some extra perlite (or whatever your soil amendment of choice) and make sure there is plenty of circulation in the grow box. That should increase the watering frequency which should improve growth.

It seems to be pretty well established that an ambient air temp of 85f is the optimal temperature for most strains to flower. Therefore if we set thermostats on our exhaust fans to maintain that temp that should also improve growth. Since CO2 can be better used at the higher temps, a real basic CO2 augmentation might also help. While the CO2 levels outdoors are just over 388ppm now, indoor the levels may be significantly higher (especially in the winter when I am brewing!) There for a slight but steady intake of this extra CO2 could also improve growth.

Anyway those are some ideas I have been thinking about for adjusting our grow rooms to LED. If we try all these things and the two week delay remains, I spose we could experiment with a timer and a infrared source (I bet Weezard already has?) If all else fails, maybe we can just veg less and switch to 12/12 sooner?

[Joefarmer]

Yeah, they definitely take longer to finish. 15-16 weeks of flower my last grow. I'm currently in week 7 of flower and just a few pistils have turned brown and still all clear trichs. I've also gathered that you can't reliably determine harvest time by checking for amber trichs. I seemed to have 5-10% amber trichs for a good 2 weeks and they stayed that way until I just couldn't bear to wait any longer and chopped em'. Great smoke.

So Weez,? How do we determine when to harvest under LEDs? Aside from the obvious... growing the same strain out a few times to guage it. :smokin:

[stra8outtaWeed]

Yeah, they definitely take longer to finish. 15-16 weeks of flower my last grow. I'm currently in week 7 of flower and just a few pistils have turned brown and still all clear trichs. I've also gathered that you can't reliably determine harvest time by checking for amber trichs. I seemed to have 5-10% amber trichs for a good 2 weeks and they stayed that way until I just couldn't bear to wait any longer and chopped em'. Great smoke.

So Weez,? How do we determine when to harvest under LEDs? Aside from the obvious... growing the same strain out a few times to guage it. :smokin:

the longest i have gone is 63 days of flower under LED's and i have about 30-40% amber trichs...are you growing some wild sativa?

i'm not Weez but i couldn't help but give my .02 ....i do everything from clone to finish under LEDS and i am finishing faster...i used to run everyting 70 days under HPS and my 63 day LED grow is narcotic!:stoned:

[sarah louise]

I'm probably gonna put together a DIY tutorial if anybody's interested in building their own light. Let me know, Hermie.

I would be very interested to see such a DIY tutorial. :thumbsup:

[Joefarmer]

the longest i have gone is 63 days of flower under LED's and i have about 30-40% amber trichs...are you growing some wild sativa?

i'm not Weez but i couldn't help but give my .02 ....i do everything from clone to finish under LEDS and i am finishing faster...i used to run everyting 70 days under HPS and my 63 day LED grow is narcotic!:stoned:

It was bagseed, definitely sativa, 2oz dried in a 3x3. 1st indoor grow. We'll get it nailed down soon. As you seem to have done.

[stra8outtaWeed]

It was bagseed, definitely sativa, 2oz dried in a 3x3. 1st indoor grow. We'll get it nailed down soon. As you seem to have done.

thanks...this is my third completed flower run on LED's and i notice them finishing faster.....the one difference that the lights i have added 3500k LED's to the mix so supplemental CFL's are not needed! :thumbsup:

[Joefarmer]

Cool. How much area does one of those lights cover? How much do they cost? I saw an ad for them or something similar in HT.