The Honeywell RPLS540A1002/U allows you to take complete control over your lights. Its three modes (manual, automatic, and random) help conserve electricity while adding a level of safety and security to your home. The 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. It is not compatible with fluorescent lighting (compatible with electronic ballasts). The model has a large backlit display with a nightlight option. This allows for easy reading in dark areas with confirmation LED for at-a-glance load status (on or off). A random mode has been included to simulate an in home presence when away. Automatic daylight savings has been included, removing the need to reprogram the light switch.