I only have an iPhone for a camera right now and usually LEDs look terrible, your probably need some kind of filter as they blind the camera. However I did my best below. This is the LEDs running from batteries so nowhere near their full output.

The reds are blinding even at this output level.

http://applications.ccusa.com/martin/IMG_0962.jpg
http://applications.ccusa.com/martin/IMG_0963.jpg
http://applications.ccusa.com/martin/IMG_0964.jpg
http://applications.ccusa.com/martin/IMG_0965.jpg

Random thought I bet I could hang those from my christmas tree haha.

Are the XP-G cool white 5 watts?

XP-G can run at up to 5W, that is if you are running them at full brightness 1500 mA.

Depending on your setup, its more likely you would run them dimmed down around 1000mA which is 3W.

For high noon effects you can run a few at full power for an hour or two.

They are really really bright!

Martin, what would be recommended for a 72g tank that is 36 long, 20 wide (front to back depth) and 25 inches deep (from top to bottom)?

What kind of difference in brightness between the white XP-E and XP-G? Can they be used together in the same circuit (like a standard series of XP-E)? I dont know if you can use 5W @ 100% with 3W in the same circuit.

Thanks

Steve

No you cant use XP-G and XP-E in the same circuit if you want them at 100% XP-E is 1000mA and XP-G is 1500mA so you would blow the XP-Es.

XP-G outputs 139 lumens and XP-E 122 that is running them at 350mA. Cree doesnt have data fro XP-E at full power which is weird. However the XP-G output 463 lumens at full power.

For that size of tank i would recommend 2 pods each holding 28 LEDs so a 56 LED setup. Since you are 20 inches wide you could use any of our 6 inch heatsinks (6 x 9 or 6 x 12). Or I am getting in some larger 10 x 10 which gives nice coverage. 50/50 royal blue to white gives you a color around 14K or you can go 60/40 for a 20K bluer look. We also have regular blues now so you can mix Royal Blue and regular Blue for more spectrum and maybe throw in an additional Red if you want.

Martin

Hey Martin, as soon as you can get some pics of these LEDs on a tank, post them. I'd be interested to see them before I start gluing my whites and blues to my heatsinks--may have to put one red and one green into my setup.