THIS BULB IS A SPECIAL USE BULB AND IS NOT USED FOR NORMAL BLACKLIGHT GLOWING EFFECTS.

This special T12 unfiltered black light bulb is primarily used as a fluorescent tube replacement in exposure units for screen printers.

This bulb is a white bulb, which gives off some visible light as well as the ultraviolet rays.

This 24-Inch 20 watt / 120V (F20T12BLRS) Blacklite Fluorescent Tube fits into any standard 24" fixture! T12 size bulb with 20,000 hour life.

Please note that tubes/bulbs for fluorescent fixtures are not interchangeable like normal incandescent light bulbs. It is very important that you get the code of a current tube or off the fixture itself and order the correct blacklight bulb. The ballast in the fixture is rated to fire a certain wattage and diameter bulb.