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Hi slycog, you've saved me from bumping my own thread--I have more info to add. I'm flattered you like the light but I have too many things going on to produce these for others. A safety note is the heatsink is not grounded (and there is no ground wire to the driver). I'm relying on "global...

I was just thinking . . . real growers grow from seed but it's a lot like Harrah's:

http://www.cree.com/~/media/Files/Cree/LED Components and Modules/XLamp/XLamp Application Notes/CXA_design_guide.pdf "Material should be cleaned from a CX family LED by gently blowing the material off the LED with clean dry air (CDA) or by wiping the LED with a lint‑free swab dipped in...

I believe linear diaphragm pumps are quieter (but I haven't compared). Alita and Secoh are good brands but not cheap. I've got a pair of EL-60 and a SLL-40. http://www.septicsolutions.net/store/secohlinear.htm#sll40 I'd recommend the 60, considering your future plans, even if you need to...

I was surprised how warm the new LED lights on my block are--they must be 3000K. Interesting.

"We are pleased to announce the merger of Gavita Nederland and Gavita Norway, and the new partnership with Hawthorne Gardening Company. Please view the video read and the attached announcement for more information." http://www.gavita-holland.com/

That would be good, 36 x 3 = 108Vf Max current is 1750mA / 2 = 875mA through each COB

The driver's "constant current region" spec (71-143V) puts you at the limit already of 4 x 36V = 144V. A person could design series/parallel circuits to get around this limitation.

What do I think? I think this is the most original thing I've seen on this forum in a while (and thanks for the laugh)! Are there big holes at the end of the mailboxes for air exchange? Reflectix is expensive but I like it a lot.

The question of how to tweak Vo and Io on the HLG-120H-48 is a good one (and I barely resisted buying some). My understanding is, these can be used as constant voltage supplies like powering fans (I'm sure there are LED applications but I'm ignorant). In this case, Vo is what matters and Io...

I haven't worked with this but I thought we could crank Vo to maximum and then set the current to what our design needs.

When WA state decided to tax rec cannabis at 37% it negated a main objective of the initiative--elimination of the black market. So I still see good sized ops being busted in the news, occasionally. I've only been to a rec store twice, when they had 25% off and it was still more than what I...

I finally put together an LED luminaire. The only difficult thing was attaching the thermocouple. It seems to be reading too low, only 10C above ambient, but the assembly is very cool. I just found my light meter so I'll check for current droop and look at Kill-A-Watt, should be 50W from the...

I can't find that model number on the corporate site.

Or woman.

The ModuLED has four M5 tapped holes on the top and bottom surfaces that could be used for mounting to a frame. (Probably would want spacers.) Myself, I'm hanging them individually by the HBG power supply. The Giga model has M3 tapped holes for the Ideal CR-2303 holder. It looks like the LES...

SimonD laid it all out for us but I still don't understand the Oprah avatar.

Per Roger Rabbit at Shroomery, the analog hygrometers are not worth a darn unless you have a hair model. http://www.ambientweather.com/fikf122pmh.html My experience with a cheap ebay hygrometer confirms this. I've never felt the need for Boveda, just have a bunch of digital Caliber III and IV...

Annual Spring HeatsinkUSA promo: 10% off orders of $100.00 or more! (Orders must be placed during the month of May 2016) Use coupon code GIVEME10

I bought a pair of those just for my new ebb-and-flow systems. Mapito is a three day cycle (which doesn't fit on a seven-day timer).