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Fluorescent lights are inexpensive to purchase and to operate. They stay cool and come in a variety of shapes and sizes. I would suggest using them over the others. I used to use a warm tube and a cool tube, but in the last couple of years, I used only the cool bulbs and they worked just fine. I don't know the strength, to be honest. I try to keep the plants 2-3 feet from the bulbs, but I vary that a lot too.
A flourescent light especially for plants is available but they don't work any better than regular flourescent lights and the plants lights are more expensive.
The Plant lights are supposed to be better for heavy blooming plants.I have both plant lights and regular shoplites.I do think the ones especially for plants work slightly better on African Violets and other Gesneriads,especialy minis,but on foliage plants I do not see a difference.If you buy fixtures watch the size.Certain size bulbs are very pricey.