BLACK LIGHT BULB ULTRAVIOLET UV 150 WATTS A21 LONG LIFE LAMP - Bulborama Industrial Grade lamps are engineered to last up to 10 times longer than standard bulbs, therefore reducing operational and maintenance costs, and saving both time and money. Industrial Grade lamps are built with brass bases to prevent socket corrosion and multi-support filaments to resist shock and vibration in any burning position. Black light sources have many uses. They may be employed for decorative and artistic lighting effects, for diagnostic and therapeutic uses in medicine, for the eradication of microorganisms, for the observation or detection of substances tagged with other substances that exhibit a fluorescent effect, for the curing of plastic resins and for attracting insects. THIS ITEM DOES NOT FULLY ILLUMINATE PAINT AND OTHER PARTICLES. ONLY "BLACK LIGHT BLUE" BULBS PROVIDE THIS EFFECT - PLEASE SEE BELOW: All Bulborama black light bulbs emit their light as UV. However, standard incandescent black lights such as this item contain UV that is the long-wave type commonly used as a party bulb or for pet applications. If you are trying to fully illuminate paint and other particles, what you are looking for is a "Black Light Blue" bulb, which is typically and most efficiently fluorescent. Fluorescent "black light blue" bulbs can use only one phosphor, and the glass envelope of the bulb is a deep-bluish-purple glass which emits only UV and no other visible light, allowing for the illumination of paint and other particles.