Best CYAN

**WookieeGunner** · 05-04-2017, 08:45 AM

Just curious what is the difference between using the Tri-Rebel with two Cyans vs Tri-Cree Green and Blue vs Tri-Cree Green and Royal Blue

**Forgetful Jedi Knight** · 05-04-2017, 09:20 AM

It would all depend on how you mix the Blues and Greens.

**Jenny** · 05-04-2017, 12:31 PM

If you take a look at the output for those, you're going to get a brightest cyan from two cyan Rebels. (and the third white for FoC). At 350 mA[1], a cyan rebel puts out 83 lumins at a typical dominant wavelength of 505 nm, which is pretty well in the middle of the cyan color band. So two are about 166 lumins, and retain the 505 nm color.

With Cree XP-E2's in an RGB, looking at max output at 350 mA, your blue is about 30.6 lm, green at 107, and royal blue at 525 mW[2]. So if you drive them all at max, you'll get a very green cyan; if you lower the output of the green so it doesn't overpower the blue, you'll get a dimmer output.

Did that help at all?

[1]Yes, I know you're going to drive it harder than that. 350mA, however, is listed on the data sheets for all of the desired LEDs, so it's an apples-to-apples comparison.

[2]No, I don't know why the RB isn't measured in lumins, or how to convert the given measurement to lumins. So much for the apples.