Quote Originally Posted by SupraSPL
Hello fellas. I have been studying the LEDEngin PDFs trying to make some price and output comparisons. I couldn't find anywhere on the mouser site where the bin code is specified. When you buy them in small quantities do they specify the bin for you before you buy?
Could not find bin codes either.
Even on the 5 Watt stars.
Even on Ledengin's website.
Though I must admit I didn't look very hard.

Did not expect them on the 15 Watt emitters anyway.
(It was a short run. Kinda all one bin.)

Though DH was unhappy with the workmanship on some 15W. Ledengins as I recall.
Mine were quite uniform.:jointsmile:

And, while I lack the funds and patience for precise measurements, I still manage to cheaply gauge the relative output of narrow band leds.
[attachment=o238717]
My li'l redneck radiometer gives me an cheap n dirty method of comparing relative strength.:rastasmoke:
I'm a practical type.
I worry little about bins, minor variations, meaningless details, etc.
I'm jus' a bottom line, kine.

I read, a lot, then experimented.
Tested the concepts that I'd read about.
Each light taught me something about a plants needs.
Then I simplified.
Eliminated everything they didn't actually need.

BTW, that little 5 Watt stars array, grew some serious bud with 660 nm.reds, and "royal" blue.
But,
The 15 Watt emitter arrays:asskick:!!

Any way we can he'p, no be shy, brah.

Aloha,
Weezard
Weezard Reviewed by Weezard on . Calling out to Weezard for LED advice My friend, I've read your stuff here and at Steve F.'s site. I want to build a dedicated flowering lamp using Ledengin 15 watters. (4 reds, 1 blue, and possibly 1 warm white; LM 317's so I can tweak the ratios.) Essentially, a copy of your 4+1 cake pan lamp but built on a 4 x 18" finned heatsink so I can see what's going on under it.) If I were to post my picks for power supply, resistor ratings / values, etc., would you critique and perhaps offer some guidance? I have already purchased Rating: 5