I've got a couple of these that work really well for the price. The downsides are that it puts out a lot of heat (can be an upside for things like peppers that like it hot) and the smaller surface area so you have to be more careful with positioning.

I also like this one - don't buy it at the $100+ price since it regularly drops to a price in the $40s. It has a bigger surface area, puts out less heat, and gives you better control over how much light you want.