This American DJ 24 inch Blacklight will light up about a 6-8 foot area. Uses a fluorescent bulb for extra quality and life. Use to light up glow in the dark, UV reactive items, or blacklight responsive items. Includes instant on feature. 20 watt fluorescent bulb 24 in. high output black light with tube & fixture Reflectors for super high output! Assembled with tube & fixture On/Off switch Dimensions (LxWxH): 24" x 3.75" x 1.75" NOTE: Anything Under 24" should not be used for black light puppetry.