Are you talking about spiral compact fluorescent screw in bulbs?
For larger tanks it prob better and easier to use tube fluorescent bulbs like a shop light. The smaller diameter the better because of restrike, so T8's if you can find them would be better than T12's(but will still work)
look for 5,000k to 10,000K bulbs, normally sold as "daylight" or "full spectrum" or similar.
your wattage depends on how high of maintenance you are OK with. Like 1.5 watts per gallon(so 135 watts on a 90g) would be pretty low maintenance but grow some plants. Higher like ~2wpg and above will be more work and CO2
/ferts would be a benefit/needed, plants will grow fast and almost anything will grow well.
10G,Planted- Endler's Livebearers+RCS, 55G,planted
Originally Posted by Kurt_Nelson
Understanding the basics will let you make informed decisions on what advice to follow, and what advice is just plain hooey!