Only change blubs when they get dark at ends of flicker. >>> Hi Steve. Thanks for the tips. Somewhere along the way, I was >>>instructed to use the lights for only x many hours/day. But in my >>>solarium, I'd just as soon leave them on as you say. also, I've been >>>told that using the less expensive "cool white" fluorescent bulbs is >>>equal to using the more expensive "grow lites". Does that work for you? >>>Do you change the bulbs yearly? How can I tell when they need changing? >>>Tom << ======================================================= Uncle Steve's Hot Stuff 1998 product list is available by auto response Email to: mailto:hot.chiles@usa.net =======================================================