90W homemade LED grow
- Thread starter JMD
- Start date
NightOwlBono
Well-Known Member
Cool man
Whats it's spec's?
how many of each color?what spectrums did you use. How many watt diodes ?
Whats it's spec's?
how many of each color?what spectrums did you use. How many watt diodes ?
JMD
Well-Known Member
I'm using three of these modules: http://www.topledlight.com/30w-cree-led-emitter-30-watts-red-blue-grow-light-diy_p1096.html
The spectrum could be better, but they work great. I run them off three 1000 mA constant current DC/DC drivers.
NightOwlBono
Well-Known Member
I wouldn't risk using it as my only light,but those will make great supplementary lighting
JMD
Well-Known Member
As you see they actually work just fine
And that's what I wanted to test - now I'm going to test 10W and 100W LEDs, and see if they are any good.
JMD
Well-Known Member
Do you have a link for that thread? I'm still new to this forum
But what is the theory behind the 500-600nm range? The Chlorophyll utilization of those wave lengths seems to be more or less non-existent.
I'm very open to any help I can get, I just like to hear the theory/science behind it.
My setup is as follows: 230V to 24VAC transformer -> Diode bridge -> A total of 8100 uF (5x 680 uF and 1x 4700 uF) -> Three MeanWell LDD-1000H constant current drivers.
Actual power draw of the LEDs are 24W (23.980V @ 1000 mA), which means the actual power to the LED lamp is only 72W. The entire setup, with fans and everything, draws 101W, which I find very reasonably considering the grow.
Sure thing mate. Bear in mind that this is my first attempt at testing whether LED was suitable for growing, so it is purely made to work, not to look pretty!
My next LED lamp will be a total of 12x 10W (8x red, 4x blue) and a 100W red. Here's the heatsink with the 8 red and 4 blue (not yet screwed into place):
Total cost is roughly 65 USD, for 220W. This includes boost converters to supply the LEDs. All that is needed, is to connect the converters to 12V (or up to 28V).
PetFlora
Well-Known Member
You can find links throughout the various led threads here, but all you need do is look at the most current offerings from led companies with a mmj background. So far USA and Europe have been leading the way. China is just a cheap mimicker, though they could be a real threat, apparently there's sufficient money in knockoffs
JMD
Well-Known Member
What is mmj short for?
Do you have any link that discusses the 500-600nm light? It seems a bit weird to me that the plants want the green spectrum - they are green because they absorb everything but the green light.
It just seems counter-intuitive to me, so any links or info is greatly appreciated
Do you have a specific model number for the cree bulbs? I will have to find a European shop - import tax from the US is insane, sadly.
PetFlora
Well-Known Member
EU- check out www.astirgrows.led
mmj= medical marijuana
mmj= medical marijuana
JMD
Well-Known Member
Seems like they only sell LED panels (if it's http://astirgrows.com you mean).
Do you have any specific Cree bulbs in mind, or would any Cree WW be ok? (or any good quality WW)
Slipon
Well-Known Member
yea any good quality LED in WW or CW will do just fine, what ever you find to fit your specs, Cree, Epistar osram, Bridgelux just get some Whites in there to cover the full spectrum, even tho MJ or any plants Im sure, require a high amount of Red (600-700nM) and some Blue (420-480nM) to do good and grow hugh fruits/Bud`s it seem`s like the plant also need some other spectrums to do good/thrive, even yellow and some also report that the green have some effect, so IMO you sure need a hugh amount and a majority of Red mixed with some blue in the right spectrums (430/470 and 630/660nM) to grow dank weed, but the plant need more the red/blue to thrive and get to the lever where it grow them Bud`s we all love (damn I write to much when Im stoned, witch is always)
Green light penetrates the canopy (since the green leaves reflect) better than red\blue so if your going for maximum photosynthesis through the whole canopy then incorporating green is helpfull. Green has been shown to drive photosynthesis in studies that track O2 production with light of different wavelengths.
It might be easier to throw some fluoro tubes into the mix for broad spectrum lighting instead of putting in a bunch of white led chips. Fluoros will give a better spread through the canopy.
PetFlora
Well-Known Member
Fluoros? We don't need no stink fluoros!
Actually I have an 8 bulb x 4ft HOT5, but will be retrofitting to accommodate led tubes as soon as they are available in 30w+.
The pic is of 4 x 4ft led tubes which were installed 2 weeks after flip to 12/12, not quite a month (6/ 19-20) + a few led globes w/wo globe
so I should get rid of my 54w T5s for some overpriced under wattage 22w led T8 tubes that are designed for residential lighting in the same space ?
I understand your going for minimal wattage growing, but really cannabis is a sun worshipper.
JMD
Well-Known Member
Today's update:
View attachment 2744562View attachment 2744563View attachment 2744564
1st: Main cola of 1st plant
2nd: Side bud
3rd: Main cola of 2nd plant
View attachment 2744562View attachment 2744563View attachment 2744564
1st: Main cola of 1st plant
2nd: Side bud
3rd: Main cola of 2nd plant