Hmmm... I have XP-G's, XR-E's and XP-E's all mixed up in the one string powered by a Meanwell ELN-60-48D with no problems so far. (?!?)

If that's the case, you should be running it at 700mA so that you don't burn out the XR-E's...running them at 1000mA will kill them far more quickly than you want to.

yes, perhaps I'd better split them up.... or dial back the drivers - these things put out enough light that I wouldn't need to worry about running them at 1000mA anyway. Curiously, everything is going well....

Actually, just figured I'd go in and check that out to be sure and no, actually, I was not right. The only mix is XP-G and XP-E. The XR-E's are all on a separate driver.

Then you are set...I plan to run my XP-E's at 800-900 and my xp-g's at 1000 but you're right, they are so bright that they don't really need to be run that bright if it extends their life.

just stopped soldering only 30 XPE royal blue,here are some quick photos.

http://i726.photobucket.com/albums/w...d/IMG_0604.jpg
http://i726.photobucket.com/albums/w...d/IMG_0606.jpg
http://i726.photobucket.com/albums/w...d/IMG_0608.jpg
http://i726.photobucket.com/albums/w...d/IMG_0602.jpg
http://i726.photobucket.com/albums/w...d/IMG_0612.jpg
http://i726.photobucket.com/albums/w...d/IMG_0603.jpg

Very cool! On the bigger heatsink you really have those LED's pushed together...what will that be lighting? I would be a little afraid you're going to cook whatever is under that! My understanding is that usually people put LED's on 2" centers...you have them touching. Are you putting optics on those?

i am putting 40degree optics.
the whole setup will be 3 separate arrays with each containing 40 X3w led.running them over a 180glns tank.
the reason they are close is because i am running an ac 6" fan on each heatsink,keeping it as low as 26 degrees.
will be running it at 1050Ma for all leds.

the 3rd photo is just a test sample of only 6 led on a small heatsink with a puckpuk running intervals at 170Ma,400Ma and the last at 920Ma.

So with those optics I'm assuming that you are putting the fixture quite high above the tank. Otherwise I would suspect that you might have three big spotlights.

my tank is an inwall with a somewhat spaced back room to play. so yes it will be high not sure how high yet.