Any "plant light" that goes for $5 to $20 is almost certainly a worthless scam. In that price range, you're better off with a two-tube 4' shoplight. This has an effective range of a few inches.

What about a 100 watt compact flourecsent?

I bought some 48 inch florescent "plant" lights at Walmart. They have worked just fine, although I only bought them because they were out of the cheaper regular shoplights I think they were about $5 each.

Make sure you read the label. I accidently bought a plant light and got home only to find out it was just to make my plants appear greener, not help them grow.

I got a hanging shop light at Walmart for $8. It's quite small and doesn't take up much space. If you bought a 2-pack of lights, it would probably be under $11 total for the whole set up. I've had good success with 40 watt lights.

Allison

Upon closer inspection the "plant" lights were just flood lights with blue lenses. I got cfls that are 1600 lumen, 2700k. I'm hoping that with all of the indirect light in the room one will be enough. When they start to flour I can put another up.
Will that kelvin work?
On a side note I will be changing every bulb in the house to cfls. I didn't realise they were that efficient.

"What about a 100 watt compact flourecsent?"

The light is concentrated, but is more difficult
to reflect than a point or line source.