when i first tried it, comparing it with no reflector and with reflector. its almost twice as bright. when i hooked everything up and gave it a test run. my eyes hurt from looking at the light. i had to look away after a second. i thought it will surly bleach the crap out of my corals, but when i put it on the tank. it was a bit brighter than before. color wise everything looked a lot better. coloration is amazing.