Cfl Daylight bulbs as grow lights?

[ALToronto]

100 W equivalent is not too strong. I have 3 of them, about 24" above the plants, and they're a good supplementary light source in the winter months. I wouldn't want to use them as the sole source of light, or else I'd have to triple their number (and wind up burning the plants - they do get hot)

I've just found some LED lamps that go into a regular lightbulb socket. These are also available in big box stores, and come in warm white (2700 K), bright white (3000 K) and daylight (5000 K) temperatures. I bought some 60 W equivalents in daylight. They put out 800 lumens and are actually a little bit brighter than the 100 W equivalent CFLs (as measured with my smartphone app, for all it's worth). More expensive but a lot cooler (temperature, that is). The only problem is, most are made to be dimmable, so you're paying an extra $10-15 for a feature you'll never use. Try to find some that aren't dimmable, and you'll end up with a brighter light as well.