The Honeywell s PLS550A1006 allows you to take complete control over your lights. Its three modes manual, automatic, and random help you conserve electricity while adding a level of safety and security to your home. This Honeywell econoswitch programmable timer switch has both the flexibility of 7 day programming and the convenience of automatic sunrise / sunset activation. This unit works with incandescent, and halogen lighting, but is not compatible with fluorescent lighting compatible with electronic ballasts . has a large white backlit display with a night light mode option for easy reading in dark areas with confirmation led for at a glance load status on or off . random mode activates lights randomly to simulate a presence when away from home. Easy intuitive 3 button interface with no door to open. Automatic daylight savings no need to reprogram.