Do not be fooled by the low price $29.95! This is a fully functional sunrise simulator with a smooth and gradual brightening cycle. Acts like a Sunrise alarm clock! Sunrise time can be adjusted from 30 - 90 minutes duration. Stay on time after that can be adjusted from 0 - 10 hours. 300 watts maximum. Incandescent bulbs only. Halogen bulbs work great! 110 volt - 60hz only. Not for use with CFL, fluorescent, LED, or dimmer equipped lamps.