Tap a light to turn it on with this screw in touch dimmer for lamps! No more getting up from your easy chair to find a light switch. Simply tap the metal portion of any lamp: once for night-lightradiance, twice for medium light, three times for bright light, and four times to turn it off. Enjoy easy on/off lighting without paying high prices for touch-control lamps! UL listed touch lamp switch. Maximum 150 watt bulbs; incandescent and halogen bulbs only.