40-Watt Tubular Blacklight Unit illuminates blacklight costumes and sets, giving them their special glow-in-the-dark effect. On-off switch. Ready to go. *Portable design can be used vertically or horizontally.*Measures 48" long.*Wide angle will illuminate a 10' x 15' area.*Plugs into standard 120V outlet.*Requires no warm-up period.*Bulb included.