Editorial Review:Product Description:- Saves energy! - Automatically turns lights off when room is unoccupied. - Wide angle coverage, Detection zone 150 degrees. - Rated 500 watts maximum. - 120 volts AC. - Not for use with electronic ballasts. - Perfect for stairways, hallways, or rooms where two wall switches control a light. - Automatically turn lights on when you enter a dark room. - Adjustable timer turns lights off after all occupants exit the room. - Can be used up to 500 watts of incandescent or 400 watts of fluorescent lighting (minimum of two tubes required - magnetic ballast only). - Adjustable photocell prevents operation of lights when adequate lighting exists in the room.
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Customer Reviews
Average Rating:
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Good after dark
Like the other reviewer I had great results but one problem:
After dark they work great. My light switch is beside a window and as long as the sun is up the thing won't work.
EDIT 5-26-2008: User error here! The instructions aren't very well worded, but there's a "light" setting that actually adjusts the sensitivity for ambient light. Cranked it up and now it works great. No complaints!
Rating: 
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Never touch your light switches again.
During a visit to my brothers fabulous new condo I fell in love with his auto motion-sensing lights that were scattered around the house. I have a long hallway at home and I definitely could benefit from having one, so i looked it up, researched it, and found out it was these fancy little light switches that were doing all the work. I found this unit here on Amazon and a similar unit at Home Depot for around the same price. After finding my local Home Depot out of stock, I ordered two of these light switches and they came within a few days. Installing them was a cinch, even on my 80-year old apartment's wiring. The end result is everything I imagined it to be. All for a little over 20 bucks a piece? It's totally worth it. I'm ordering two more for the bathroom and the living room.
TO NOTE: Installing is pretty easy. It comes with directions but you pretty much just hook it up the same way your old light switch is hooked up. Be sure to turn off the power to the section of the house/apartment where you'll be installing these. Don't electrocute yourself.