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#2
10-14-2009, 04:08 PM
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It depends on the wattage that you need. I believe HQI comes in 70, 150, 250, and 400... the mogul systems come in 175, 250, and 400 (and higher) watts. The mogul bulbs don't require a glass UV shield, since the bulb is already shielded. Note also that electronic ballasts will run bulbs whiter / bluer than either magnetic or HQI ballasts.
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Calvin --- Planning a 29 gallon mixed reef... 
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