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 geokills
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Registered: 05/08/01
Posts: 1,287
Loc: city of angels
Last seen: 1 year, 7 months
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 Re: Building LED Grow Lights - Need your help!  [Re: shpongled]
#315493 - 11/14/09 03:26 PM (15 years, 4 months ago) |
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I am interested. In fact, late this past week I received a working 300w prototype built to my own specifications from a manufacturer in China, at about half the cost that comparable US suppliers are asking. It took me about four months, as the first shipment arrived defective. I returned it and the second shipment was also defective - I opened up the unit and found that the one of the voltage converter boards had a broken part likely from impact during shipping. So the third time around, I requested double-boxing and also changed my requested light ratio after researching more on the subject.
I was hoping to already have real world results by this time, but due to all the extra shipping delays I'm only now going to be able to start testing the array in the greenhouse, and since the Thanksgiving holiday is coming up, I may not even get to start that leg of this project until December. We'll see how it goes... I probably won't have a good idea of its relative efficiency with respect to conventional HID light sources for several more months but I finally have my feet wet and I'm getting excited to see what these guys can do! I plan to order a couple more smaller (~150w) arrays with slight variations in the LED wavelength ratios in efforts to determine the most productive combination.
The system itself is pretty straightforward. The LED's are mounted into an aluminum heat sink, with one voltage converter feeding 48 1 watt LED's. Fans are mounted behind the heat sink to dissipate the thermal build up and the whole shabang is placed inside steel housing. I'd wager your best bet on finding relatively inexpensive LED's is to go straight to the factories that produce them in Szhenchen, China.
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geokills
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Registered: 05/08/01
Posts: 1,287
Loc: city of angels
Last seen: 1 year, 7 months
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 Re: Building LED Grow Lights - Need your help! [Re: rodfarva]
#317690 - 11/18/09 09:57 AM (15 years, 4 months ago) |
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Cost is roughly US$ 500 - $600 for a 300 watt panel (typically selling for upwards of $1000 here state side) not including freight expense. I won't know how they compare to existing units or their appropriate applications for several months, as I've only started my research in this area. For Chinese vendors, look into global trade websites and, of course, use Google.
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Do Your Part!
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