Light Controls

Screw-in photosensitive light control  devices offer a measure of safety, security, and convenience by automatically turning your light on at dusk, off at dawn. They can simulate home occupancy, end coming home to a dark house, require no seasonal adjustments with timers and save you money because your light is on only when needed.

You might want to consider, however, that if you frequently work late and want this kind of control just so that the house isn't dark when you get home, the light will be on for several hours before you get home in the winter. This is especially true in northern climates -- the sun may set at 4:00 pm, but you may not be home until 7:00 pm -- which means your light would run for three hours with no one there.

This kind of control might be a good choice for external lights, however, so that you have a well-lit area while you are parking your car and looking for your keys. You might also consider a motion-sensor light control. 

External Links

• Conservastore offers screw-in photosensitive light controls for normal light bulbs and for floodlights.
• Lowe's -- tips on saving energy with various changes to your lighting system.