Radions...
I have three XR30 Gen 4 Pro's on a rail over my cube. 48"L x 36" w x 26"T. Left and Right lights are positioned longer from front to back, center light is positioned longer side to side.
Lighting is great from front to back and side to side. I do NOT use defusers as I want to keep as much light off the glass as to keep algae growth to a minimum. I don't have to run the lights hard and I am not seeing any cones of light per say. Clean my glass every 4-5 days. Very happy with the uniform focus of light downward.
In my new build thats in the works, I plan on adding 2 more XR30's as the tank is going to be 8' long. I figure 5 lights over 8 feet should do the job quite nice.
Indecently, I have two XR30's over my coral tank. Its a 4' long Marineland bowfront. I've had for a while and the light throughout is great.
Hope this helps....
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