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When I get ready to replace my HO and actinic bulbs, can I buy bulbs that have a higher wattage? I feel I a could use a little more but don't want to buy a whole new fixture.
The wattage will be the same in the bulbs depending on length. To get a higher wattage bulb means you need a larger bulb which means it isn't gonna fit. You can always order a retro fit kit and add more light to your tank that way.