Re: Photo electric switch with CFL
If the sensor has a neutral (white) wire, the CFL should work fine. Many sensors do not have a neutral wire, and depend on the resistance of an incandescent bulb to provide a return path for the electricity that powers them -- CFLs don't provide the proper resistance so they fail to work.
If you choose to replace the sensor (and the electrical box has a neutral wire available), be sure to replace it with a sensor that has a neutral wire.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.