SUNLITE 40487-SU FUL40T8 Fluorescent Black Light Bulbs, 40 Watts, GX10q 4-Pin Base, UV Light, 365nm Color Wavelength, 5,000 Hour

These fluorescent bulbs feature a U-shaped twin tube design providing ample light in a compact space. Blacklight bulb (BLB) emits ultraviolet (UV-A) light at 365nm wavelength perfect for lighting up reactive surfaces while not illuminating the surrounding areas. 4-Pin GX10q base for use in many residential and commercial fixtures both indoors and outdoors. Outdoor use requires a weather protected fixtures Ideal for creating a glow effect with colors like true white and neon hues for parties, clubs, and Halloween decorations. With a 5,000 hour life span. Designed to work with a variety of indoor and outdoor fixtures in both residential and commercial applications. Flowtron replacement bulb. Sold by a USA Based Company