The Norman Lamps F40T12-BL is a 40W T12 fluorescent black light tube producing ultraviolet energy centered at 350nm. The lamp measures 48.0 inches in length and 1.50 inches in diameter, fitting standard 4-foot rapid-start fluorescent fixtures equipped with a G13 medium bi-pin base. Its white phosphor construction yields a characteristic slight purple-white glow when illuminated, distinguishing it from blue-glass black light blue (BLB) types while still delivering strong UVA output in the 350-365nm range.

This T12 fluorescent tube serves a broad range of professional and commercial applications. It is widely used in insect control traps, decorative and entertainment blacklight effects, document verification, fluorescent dye inspection, forensics, and various UV-dependent industrial processes such as plate exposure. The 350nm UVA emission makes it effective at exciting fluorescent materials while remaining predominantly invisible to the human eye in darkened environments.

Rated at 6,000 average life hours, this fluorescent lamp is designed for use in standard 4-foot T12 black light fixtures. An optional FEP shatterproof coating is available, adding a protective layer that contains glass fragments in the event of breakage, making it suitable for food-service, food-processing, and other safety-sensitive environments. The lamp is also cross-referenced with Sylvania part numbers 23499 and 24922 (F40/350BL) and is sold individually, with full-case quantities available in increments of 25.

• 40W T12 fluorescent black light tube, 48.0 in. length x 1.50 in. diameter, G13 medium bi-pin base
• Emits UVA energy at 350nm with white phosphor finish, producing a slight purple-white glow when lit
• Rated 6,000 average life hours; runs on standard 4-foot rapid-start T12 fluorescent ballasts
• Suited for insect control traps, decorative blacklight effects, UV inspection, forensics, and industrial plate exposure
• Optional FEP shatterproof coating available for safety-sensitive and food-service environments
• Sold individually; order 25 units for a full case — cross-references Sylvania F40/350BL (23499 / 24922)