Quote Originally Posted by ledtime
W,

I have requested the spec sheets on those custom made LED's. We'll see what they have to say for themselves, and then test them to see how full of it they are.

Don't get "hung-up" on minor details, brah.

Knna has a point when he says Ledengin emitters are less efficient than some others, but, as led producers leapfrog each other, one led is always going to be more or less efficient than the next.
It's a fluid situation.
Since none of the "wehavemorephotonsperWatt" guys was making 15 Watt emitters, at the time that I was designing my array, the choice was clear.
Might cost me 3 or 4 Watts more, but the overall results are outstanding!

Hopefully, they can come through!

Have a ? on the wavelengths in the blue spectrum. The charts you show me say 430 and 452....yet most of these led lights are using 470. What should I really be aiming for?
Most of 'em use 460-470nm. because that's what has been affordable/available when they designed their lights.
Compromise is mandatory if you expect to make a profit.

If your supplier can provide 430 and 450 blue, woohoo!

Emerson would be tickled pink.
I'd really like to see that.

If not, I'd gun for dead center at 440 nm. with a wide "skirt".

Havin' fun yet?
Weeze