WitchWeedSG
- Posts
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- Joined
- Sep 13, 2015
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- 13
i just put my 2 mars 400 back in their boxes, all DIY now, Supra thank you man thank you very much
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WwW
THNX guys. KNNA got me started way back on Gardenscure and he gave away very valuable info for free, even buying reels of top bin LEDs and sourcing dimmable drivers and shipping them all over the world to help LED DIYers. Now we have a great team of growers testing and sourcing equipment and helping each other out. It is amazing what you can achieve with COBs as far as reducing heat/humidity and improving quality not to mention electrical efficiency.
You could build a very small lamp to test it out and then scale it up as large as you want if you like the results
View attachment 415812
3000K CXA3070 or Vero 29 $40 Digikey
1.4A driver $13 eBay
heatsink/fan - $10 PCOutlet
fan power supply high efficiency - $6eBay
total $68 for 52W dissipation
Of course that does not take into account the costs of all the misc stuff you might not have on hand, soldering iron, kapton tape, thermal paste, slide connectors, heatshrink tubing, zinc chain etc. But it could be even cheaper if you already have a CPU cooler laying around and you could use any old wall wort to power the fan.
This guy is the one of if not the top diy guru's there is. He is so generous with help and openness of his idea's. It's literally is the top efficiency of any lighting. Which translates to output. 1.9µmols/w...or for guys stuck on lumens, around 150-160+lm/w...all while in a perfect flowering(and general growth) spectrum for cannabis.
I am building a system pretty much all based on his work and his guidance. It's in the works as we type. Super pumped for it to be completed.
Bringing top quality LED's to the masses.
Thank you as always.
Those are garbage. I got similar COBs that were supposed to be Red off Amazon. The one was ok, even turned down but the other did the same thing as the one pictured. It also had that crappy Phosphor coating that made it look more like orange than red.Here is one reason to stay away from the cheap "Grow LED's"
This is a Cree 3590 given just enough power to start lighting the LED's
View attachment 568320
notice how every LED is evenly illuminated
Here are some cheap "Full Spectrum Grow LED's" just coming on.
View attachment 568321 View attachment 568322 View attachment 568323 View attachment 568324
These are 30W units, there should be 3 rows of 10 in each package
Not evenly lit up at all, the last one is close .
They all look the same when you power them fully, but I suspect high failure rates in the future.
I would think they are rejects or seconds from manufacturing, or maybe they just don't care.
Someone who knows more than me can explain this better.
If you are looking to get some lights built, pm me. I can help you. I have built a few fixtures, a 200w veg light, and a 400w bloom light with far red leds. you can lool up my builds under the LED lights. I also do remote driver setups with a separate driver board with power, timers, and junction boxes. cost would be parts cost, plus labor hours, plus S&H. fair-priced. I have a professional Engineering company that we design/build power, lighting, ventilation, space, etc. peaceCurious what you'd charge to build a 4-5ft light bar, one for veg. Do you know what the footprint is on it? i need to upgrade my old t8 leds, trying to get 5-6ft of growth in 2 months between bringing them out for sun and back under lights. With my leds, i know its a pretty far off sight. I was just about ready to take an old xtrasun switchable 400/600/1k ballast down to the shop to get it fixed, and get a big parabolic hood, and run a MH. But with what i've read in this thread, with the right spectrum and the right lights and equipment, you get the best results with these lights vegging, and don't break the watt bank too hard? If you can figure out the foot print on4-5ft one, and the total cost you'd charge, and maybe total watt/lumens per..i'm pretty sure i'd buy 3-5 of these rather quickly if it can match an hps/mh for 1/3 the cost (or near)
that was the prototype 45 watts.. heres the latest pro panel i made.. 150 w 30 XML2 4300k with 60 degree 30 mm convex lens hanging @ 7 'i just put my 2 mars 400 back in their boxes, all DIY now, Supra thank you man thank you very much
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Hi can you give me any information about a medium cob build 6/8 plants max from seed too flower I'm new to led so any help would be great thank almost forgot I'm in the UKHey guys a lot of you know me from RIU or ICMag but for the LED growers here that have not seen it, here is the recipe for building DIY LED very cheaply. Why build a DIY lamp? You can get up to 49% efficiency if you can find the top bins and run them soft (700mA). You can get 36% efficiency with the mid bin running hard (1400mA). The best commercial LEDs (Area 51, Apache, Onyx) are in the low 30s. Another advantage is the ability to have remote drivers to keep that heat out of your grow space and away from the LED heatsinks.
Everything has changed since COBs became available to us. It is much easier to build a lamp and it turns out that 3000K works just fine on its own, better than HPS even.
For the simplest build the best COBS to use are the Cree CXA3070 and Vero 29. The CXA 3000K has 14% blue and the Vero 3000K 8-10%. They are available on Digikey or if you need a bulk order you can save $ on Arrow.
As far as drivers go, 1.4A is a good compromise between cost and efficiency. They are available on eBay for $13, 90% efficient and power factor corrected. You can use Mean Well LPC-60-1400 but it is lower efficiency and not power factor corrected. If you want to run at 1050mA you can use Mean Well LPC-60-1050. The one I tested was 88% efficient.
For heatsinks, CPU coolers work great for small grows. The 92mm Arctic 11 Plus is a favorite because it can be found for $10 and uses a fluid dynamic bearing fan, lots of cooling power and not too loud. Amazon and Newegg sometimes offer them for $10. Currently outletPC has them for $10 with reasonable shipping cost.
If you are building a medium or large lamp, I recommend HeatsinkUSA 5.88" profile. A 12" length is good for (2) COBs and a 24" length is good for (4) COBs. You can cool it with a single 140mm fan to make a super efficient cooling combo. I recommend the Prolimatech 140mm from Amazon. It is quiet even at 13V and moves a lot of air.
View attachment 415611
The Vero is solder free but the Cree requires a COB holder and to go solder free. Both methods require drilling and tapping the heatsink. I don't mind the soldering so rather than drilling, I mount the COB with Prolimatech PK3 thermal paste and then use kapton to tape the COB in place so it cannot slide sideways. The paste makes a very strong vacuum when you press the COB onto the heatsink. It will not come off from gravity or heat. If you try to pry it off it will break. You have to twist it and then slide it sideways to get it off.
Small build:
View attachment 415595
Medium build:
View attachment 415593
Large build:
View attachment 415594
Give him your room or tent dimensions and it will be easier for him or others to answer.Hi can you give me any information about a medium cob build 6/8 plants max from seed too flower I'm new to led so any help would be great thank almost forgot I'm in the UK
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Sorry its 1 square meter 180 tentGive him your room or tent dimensions and it will be easier for him or others to answer.
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