The Norman Lamps F20T12/350BL is a 20W T12 fluorescent blacklight tube engineered to emit ultraviolet energy centered at a 350 nanometer peak wavelength. This linear fluorescent lamp measures 24.0 inches in length with a 1.50 inch diameter and fits standard G13 medium bi-pin fluorescent fixtures, making it a direct drop-in replacement for a wide range of compatible ballasts and housings. The phosphor coating transmits UV-A output while the white glass envelope allows visible violet light to pass, distinguishing it from black light blue types that use a dark filter glass.

This T12 fluorescent blacklight tube is well suited for a broad range of applications including UV fluorescence inspection, forensic examination, counterfeit currency detection, mineral and gemstone identification, screen printing plate exposure, decorative and theatrical lighting effects, and insect control fixtures such as bug zappers and fly traps. It serves as a direct cross reference to the Sylvania F20T12/350BL and is also a recognized replacement for the GT-220 insect lamp.

Rated for 15,000 life hours, this fluorescent tube delivers dependable long-term service in both commercial and residential settings. The G13 medium bi-pin base provides a secure, reliable connection in standard T12 fluorescent fixtures.

• 20W T12 fluorescent blacklight tube, 24.0 in. length, 1.50 in. diameter — fits standard T12 fluorescent fixtures
• 350nm UV-A peak wavelength output — effective for inspection, plate exposure, decorative effects, and insect control applications
• G13 medium bi-pin base for easy installation in compatible fluorescent ballast fixtures
• Black Light (White) type — white glass envelope transmits UV-A and visible violet light without a dark filter
• Rated 15,000 life hours for long-term, low-maintenance fluorescent service
• Cross reference: Sylvania F20T12/350BL — also replaces GT-220 insect lamp