plants?

[Solid Snake]

would they be fine with just a 100watt light bulb?

[Kyle Barker]

Would depend on the plant. But most likely.

[ohh_kristina]

a lot of plants need UV and thrive under them. I've heard pothos do well under a UV light.
A 100w bulb will only give off heat. That will do nothing for the plant.

[Kyle Barker]

i generally go by kalvins. The higher the better. I dont think it is so much the UV, its more just having the full colour spectrum. Normal incandecents usually give off the lower calvin red end, wheras a lot of flour's give off higher more blue spectrum. Both types exist on both ends of the spectrum.

[Derrick]

geneally a full spectrum florcent would be better, cheap to run and cooler.

[Kyle Barker]

those new energy saving flouro's that go into an incandecent fixture are really good. They lean more to the red end, but man do they grow plants fast! reflectors go a long way as well.