Originally Posted by tonedogz
the degrees are the focus of the light 60 would be a narrower beam then 90 or 120. 120 would be a wide beam. Wider beams would be used for shallower tanks 90 or 60 would be used for deeper tanks to concentrate the light more. I think most fixtures are of the 90 degree angle.
no no no. i understand how the optics concentrate the light and what-not. what the question for the seller was which LEDs (blue, white, red, etc) have the 90 degree optics and which ones have the 120. i never planned to get a 60degree optics but the seller's response didn't make sense to me. the listing has it at 90/120 mixed optics.