JUST BOUGHT A ODYSSEA 260 WATT TANK LIGHT AND I HOOKED IT UP AND MY FISH WENT CRAZY THEN THEY WERE ALL HIDING. TURNED IT OFF AND THEY ALL CAME OUT. I USE TO USE A STANDARD SINGLE HALOGEN BULB. CAN A TOP LIGHT BE TO BRIGHT FOR FISH? OR DO THEY JUST NEED TO GET USED TO IT?