Lighting 20W Blacklight UV Bulb Energy Saving Lamp Screw20W Blacklight UV Bulb Energy Saving Lamp Screw Replace an ordinary screw fitting light bulb with this energy saving black light blue UV bulb to create "glow in the dark" lighting effects. Ideal for parties, discotheques, pubs, night clubs or other similar spaces as well as for a range of agricultural use. FEATURES: * With screw fitting E27 * Emits UV radiation in the long wave range, and little visible light * High UV light intensity * Energy saving