Hi i just bought a used but leak free 30 gallon high tank the dimensions are 24 by 12 by 20. My problem is that the hood only has one 15 watt bulb. I would like to plant it but i am pretty sure that this light is insufficient.

I dont want to get a new hood especially one with fittings for more than one light as they are expensive. So, is it possible to use one higher wattage bulb instead of more than one of the same lower wattage?