LED F8T5 (Eq to 8W CFL) Tube Lamp 4W 12 inch 10-30VDC Latest Generation, LED replacement F8T5 Tube, 12", (Eq to 8W CFL) Neutral White 4200-4500K, CRI &gt; 75, 420LM, Frosted lens The advantage is ultra-long life, and half the electricity use of CFL florescent tubes - Perfect for RV, Marine, Trailer conversions. No Mercury, No UV or IR radiation, low heat. Please ensure your F8T5 fixture is wired for 10-30V DC, this is NOT a standard 110V F8T5 - See fixture conversion instructions If this is for a RV or Marine use, then simply cut out (bypass) the ballast and wire one end to 12V, the other to negative - takes 2 mins to wire - See fixture conversion instructions