So what do you think? Two 8.5" sinks, 8 reds, 2 blues, one mastech, one 60-12, one 60-15, and two fans?
I have done it that way myself, and would do it again. Remember, that mastech will drive 7 reds. And that is kick-ass heatsink material. Easy to work. Hey, it's an investment--peeps always looking for stuff like that as scrap. Look at what folks are asking on the Bay for their used ham radio junk... After the collapse of civilization you will still be able to barter with fine heatsinks like those. :thumbsup:

7 reds and 1 blue make a nice little flowering light; better than a Procyon IMO. You wouldn't need the 60-12 yet.

You could also run the reds a tad cooler (~1100-1150mA), and build (2) 4+1 lights and still power all 8 reds with the mastech.

Then, you can add on whenever you want! I buy myself little presents like that...:thumbsup: I'd spring for 10 and save the $20, though.



If I do that would I mount the blues on the inner sides of the bottom of the sink so they stay towards the center of the room?
I'd like to get the Maestro to chip in on this one. Looks like his blues are mounted about as far apart as he can get them on his 10 + 2 light. Mine are spread out a ways, too-- that blue light has powerful effects and seems like once there's enough, it's enough. I think a more uniform distribution works well for me, despite my initial concerns with phototropism.

Reds seem different as far as coverage. I like having a red smack in the middle of the light; I just added some like that.

At 6" from the plants, having the emitters spaced closer than 6" but further than 3" apart looks like "ballpark optimum" spacing for these 15W. (That doesn't mean you gotta do that over an entire 9 sq.ft. area. Coupla concentrated areas (lamps / semi-point-sources) seem better to me than spreading your reds out too thin trying for "even" coverage over 3x3'.)

DEFINITELY would like to hear what other Ledengin 15w users think. These are just my off-the-cuff observations, based on few strains and little experience. No take to bank yet...:hippy: