Some years ago I did a rf remote control to dim CFLs - it worked after a fashion but the environment (inside the bulb holder) turned out to be just a little to harsh for the electronics of the time. What you need to do is adjust the switching frequency of the bulb. The response is not linear so you'll have to play around with the frequencies. John -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu