My local pet shop only sells 50 or 75 watt black bulbs. I think that they my be over kill in my 15 gallon tank. I want to keep it on the cool side of the tank. we keep our house on the cool side (62 -64). I want to be able to keep the cool side around 75 or so in the tank using a black light day and night. Can I use a rehostat to knock down the wattage if needed?
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