I use these lights for the plants that have to come in for the winter. I purchased one last year and my plants did great, and some did better than when they had the real sun outside.  My plant inventory has expanded so I purchased another one for this winter.  They are easy to put together, except I had a little trouble with the section that screws into the base.  It wouldn't screw in completely, but enough that it seems secure and steady.  
These are very good lights and they serve double duty because they are wonderful for lighting your home when not needed for plants.

Pros: Can be directed where needed, good for reading light, weighted so no fear of tipping over, color options.
Cons: None