I have a gt that is absolutely stunning... In his old tank. It was just a cheapy 20g aqueous tank with fluorescent bulb. Oddly the light came off kinda purple and really made his color pop. He's now in a 40b with a marineland single bright 24-36" led. His colors don't show as much and its a much whiter light. Is it because it isn't as bright or the color spectrum? I was thinking of going from this 8w unit to the double bright 36-48" led which is 3x as much light. Will this make him pop again or is it just the fluorescent that was doing that? I just didn't like the algea from flourescent and i like the natural shimmer of led, but don't want to spend a couple hundred on a light that will look the same. Any ideas?