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Ha! By that time you'll have sold enough bud to make the mk4 or 5. :hump:

See in the first pic those leaves that are curling up? That leads me to believe it might be too hot in your room. This could also have caused undue moisture loss on that cutting that you said wilted. What did you do to keep RH up around the cutting(s)? How did you care for it/what all did you...

37.2W/ft^2?! Wow, I would have expected it to be more.

Hey, Scoobs. Check out the difference in color between these two pics. Blackstar looks a lot more Magenta to me.

Got a response on the active CPU cooler that I've got. So, at 25°C ambient temp with a 12V x 140mA DC PSU powering the fan shroud, and assuming a 100W multichip LED converts all its energy into heat, it will run ~42°C (107°F) which is well within range. I was going to put a 50W LED on this guy...

Pretty much no matter what light source you use you'll want ~40W/ft^2 to flower. Really rough estimate, but work that out and see where you're at.

Ah, I got you. Yea, that Purple light looks really good for veg (hence the nice looking results so far). No need to turn the Blues off during flower, imo, I don't think it should hurt anything. Maybe trade out every other line of Blue for White if you make another panel? I believe Blue output...

Ha. I was gonna say, "Top them!" and then got to the last photo. Looking god, man. If you make a mk3 I think you could even go 3:1 Red:Blue (maybe more?). The light still looks a little Purple for a flower panel, imo.

The only problem is they told me that these LED's run 10 rows of chips in series, 10 rows in parallel, and because of that they need dice of only the same voltage and current draw in any given "row." This is why I decided on a 10% Red spectral balance. I think I'll just bite the bullet and have...

Well I haven't bought anything for the 100W custom spotlight yet. I could always ask them to not coat with their phosphor and use an Intematix 2700k RP lens. 45 x 440nm 45 x 460nm 5 x 645nm 5 x 660nm 2700k Chromalit The 75mm Round remote phosphor lens would fit this...

These are the spectral distribution graphs of their prefabbed phosphor blends.

Fwiw, I think if I wasn't so gun-ho on LED's I'd be seriously considering the new Philips Master Color series of bulbs right now. They've got some new ones ?coming out? that are higher wattage and designed for HPS ballasts. That 150W CDM bulb (MH ballast compatible) would rock my 2'x2' tent, though.

I feel you. I've bought a 50W Warm White and a 20W Neutral White for my veg room. Decided to go easy on my CPU coolers 'cause I don't know their limitations. Better safe than sorry. I've emailed the manufacturer of my active heat sink asking for thermal resistances at their fans designed rpm's...

:hump: Thanks stardust. It's "new," I don't know if it's "advanced," but I'm definitely psyched to start working on this stuff, that's for sure!

Well, I haven't heard anyone report issues with the flood lights. We'll have to wait for Chronikool to get his take. As for DIY, yes, I remember reading that gastanker wished he had bought larger passive heat sinks (which he later did). Imo, if I'm going to go 50-100W of LED I want a fan...

"New project blow 1," imo. Definitely push air into the heat sink. Oh, and -fwiw- this CPU cooler has some interesting data attached to it. There's a graph with thermal resistance vs fan rpm vs noise level. With 100W LED at room temp everything should theoretically run at 45'C (@ 1600rpm...

He's saying that using Warm White and Neutral White LED's instead of Red and Blue is better because they are broad spectrum.

Something like this attached to something like this. I've got 12VDC, 150mA wallwart to power the fan.

Nope, not yet. Spreading the goods on what I've seen you and gastanker do, basically. I do have a CPU cooler that's big enough for a 20-30W multichip, though. I'm waiting on email responses from a few suppliers concerning 30W Warm White LED's. I'm looking for a good price on stuff with 45mil...

How many Watts do you think those adhesive thermal pads can handle? It's big enough to stick multichip LED's to CPU coolers... One of those (plus asking the eBay seller to solder wires to the LED tabs, plus Wago 222's) would make LED spotlight construction virtually dummy proof.