Mine are mounted apprx 8-10 inches from the top of my 120. I have had no bleaching and been running for almost 8 months. For what its worth I have them mounted just like the ones at CF on the wooden wedge so they project across the tank. I love mine!:spin1:
The only reason I am selling is because I prefer the look of my VHO SuperActinics and I don't really have the need for two different sets of actinic lighting.
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