Quote:
Originally Posted by FrenchFry
If there are 5 LEDs per row spaced four inches apart, then the three rows would be centered over the middle 20 inches of a 30 inch tank. With 40 degree optics, wouldn't that mean the ends of the tank would be quite dark?
|
The ends of the tank would not be as bright as the middle, but they wouldn't be dark. You could increase the number to 6 per row and brighten up the ends a bit. Remember, light will reflect off the end glass to increase the brightness near the ends, too. 18 total LEDs will be a bit easier to fit to a couple of LED drivers too.
If you want to use 60 degree optics you will have to either move the light closer to the tank or switch to Cree XP-G LEDs.