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The 1212's are 12 bucks a piece compared to 24 plus for the vero 29, or the 1818. So the 1212 produces 149l/watt at 1.08, and diminishes at a higher amperage, correct?

CLU048-1212C4-303M2K1 is the chip I decided on. It's 149l/w

I figured out the data sheets last night. For my budget I am going to go with 1212. Now I am looking for a economical heat sink. Thanks for all the input!

Isn't it a 36volt chip or 34.6? That multiplied by 1.4 is about 48.5 watts.

Looking for a passive mechatronix heat sink that will work with clu48 1212 ran at 1400ma?

I am an electrician apprentice by trade (3 years in) and get the technical jargon. Where I get hung up on is how everything relates to plants in a certain size area, and figuring out what product produces what compared to another. The last time I did a grow was about 10 years ago and used a 600...

Also what arrangement would suggest? Triangle, or just straight bar?

Ok good to know! I was going to go with the vero's because they are 12 bucks on digikey.

What is the advantage of the citizen 1818 over the vero 18?

Goingto build a light with 6 vero 18's running at 900-1050. Probably going too use 1 driver. How is the heat off these compared to a 400w. Hps? Not sure if I will be using passive or active heat sinks yet. I have no problem hooking up an active cooling system, but to me the less equipment the...