This energy-efficient 3 Watt UV LED Blacklight Place-Ton Bulb uses only 3 Watts of power. Screws to your standard E27 Edison base light socket. Utilizes thrice 1 Watt Powerful Ultra violet Brought Bulbs. Estimated UV Wave length~ 395-405 nm. LEDs: thrice 1-Watt High Power Ultra violet Brought Dimensions: 2 7/8″ x 2″ (dia) 1.9 oz 110V AC – Non-Dimmable Maximum 75 degree Celsius operating temperature Not to be used in totally enclosed fixtures. Range: Max effective distance 30 foot. Max effective width 15ft. Actual results will be different. We don’t recommend this light for illuminating invisible blacklight reactive paints. Some invisible colors won’t react whatsoever while some may color shift. Bear in mind the closer you’re towards the Ultra violet source of light the greater the result is going to be.