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Lighting a 12 inch Wide Tank vs 18 Wide

456 Views 0 Replies 1 Participant Last post by  GoodOldDays
I'll be using dual bulb, normal output T-5 fixtures on a 40B which is 18 inches wide (front to back) is it necessary to use 2 fixtures to attain low to medium light? Would one suffice on a 29 gallon which is 13 inches wide. Thanks
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