You can control the intensity by adjusting height instead of time, put you lights up on blocks and slowly lower it down to your tank. The on/off on the halides are generally not good. Not saying that you're going to break it, just shorten life (the amount for 5 weeks might be so little that it's not worth worrying about)
Last edited by Lampshade; 07-29-2011 at 10:43 PM.
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