fishman9:
-my lighting system is the new 2X40 watt PC moon-lite fixture. this is the best thing i have ever bought for my tank. not only was it the best price for the amount of wattage but its power efficent, runs quiet, and stays cool. i love it!
-i run my 10k bulb for about 10 hours, and my atinic for about 11-12 hours. i like to imitate the dawn/dusk affect. the moonlite rins all day and night. thnx for asking