DYI LED for my 90g

[bfoleyiii]

I picked up 6 of the Meanwell drivers Dipan had listed so I am looking at a DYI LED for my 90g tank. I was just hoping for some input on the LED Placement and colors.

Here is what I have

http://www.maast.org/attachment.php?attachmentid=11050&d=1298828964

Heat sink is 20x7.25 so I'll use two of them unless heat would be an issue I could just go to one 42 inch to cover the entire tank. I would just leave the middle two inches free of LEDs since there is a brace there that would cover the light.

I am using the 1 XP-G to 2 Blue mentioned from the LED Presentation.
I could up the white drivers from 12 to 14 LEDS if I need more light and just change the spacing. (Typing this I will probably do so even though it changes the 2/1 ratio)

For the blues I will use the XP-E LEDs. Should I use all RB or a mix of RB/Blue?

I won’t know about lenses until after the lights are running over the tank to see if I can focus the light better and still maintain a good blend of the colors and coverage. I am expecting that I will be able to add some tighter lenses on the ends to keep more light focused on the tank and then widen them a bit as I move into the middle areas of the tank.

Any other tips or changes you might think of?

[txg8gxp]

The spacing looks fine to me. I personally would run a combo of royal blue and blue. It will add a wider range of color spectrums and the color difference may not sound like much between the two different LEDs, but it is noticeable. The LED ratio looks good, just remember to adjust the max output current on the eln-60-48d drivers for the blue/royal blue LEDs. The driver has a max output current of 1300mA and the XPE LEDs have a max current of 1000mA. The XPG cool whites will be fine with the drivers still set to a max of 1300mA because they can handle 1500mA.

[Europhyllia]

The Blue XP is kind of a greenish blue (to my eyes) while the royal blue has somewhat of a purpleish hue for me. I would go with a combo

[txg8gxp]

Yes, the royal blues are 450-465nm and the blues are 465-485nm

[dipan]

Which XPG are you using? If you have not ordered yet I would consider using all or mostly neutral whites rather than cool whites. This is the current general consensus on RC and nano-reef forums where a lot of this DIY LED stuff began.