6 Pack H&H F20T12 24″ 20W Basik 4 Cool White 4150K Fluorescent Lights Long Life on July 21, 2026 July 22, 2026 Lamp Code F20T12 BASIK 4 40/40. Color Temp 4150K. Technology Fluorescent. (Cool White). Lens Material Glass. Lamp Shape T12. Rated Life 40,000 Hours. Length 24″.