Bulb and twilight switch in oneTired of remembering to turn off your outdoor lights? Let our light sensor bulbs take care of this for you. Light sensor bulbs turn on at dusk and turn off at dawn automatically. A quick an easy solution – no messy complicated electrical installations. Just screw in a few bulbs and, hey presto, an automatic outdoor lighting system. We have both LED and CFL twilight bulbs. Just click your way through our selection to find the bulbs that best fit your needs.