The dimmers that I have I purchased at Wal-Mart, and they are called a Table Top Lamp Dimmer. It really is plug'n'play. There is some tweaking involved, and it can get a little frustrating, but they are only $9. It obviously isn't a substitute for a t-stat, but it is a quick cheap fix. They were in the "small electrical" isle of the hardware dept in Wal-Mart.