One thing to keep in mind is the size of the fluorescent
bulb. I have found that the higher wattage bulbs can be
larger than the "equivalent wattage" incandescent. I have
had them be either too long or too large in diameter to fit
some reflectors or cages. And they don't drop too well when
they're in contact with the cage!!!
I've found that they work well in my swing arm lamp on the
drill press and mill.
By the way, does anyone know if the bulb type florescence
will create a strobing effect like the old ballast and tube
types do?