The Hyper Tough 24" Fluorescent Black Light Fixture is a great choice for Halloween and parties of all kinds. The light is in the high UV spectrum, allowing it to “fluoresce” objects including white, and those pigments like neon green, pink, yellow, and orange. The 17 watt black light comes with a 31" mountable fixture that easily attaches to ceilings or above doorways to give your event that special touch. Simply plug in the light, then use the power switch to activate. Most of the light emitted is not visible to the human eye, however certain phosphors will glow brightly, giving you the awesome black light glow you’re looking for! Adding multiple lights, not linkable, to a room will increase the effect even more. You will see things in a whole new light!Fluorescent Lamp contains Mercury; Only Replace with 17W T8 Black Light Fluorescent Lamp