The picture of size is 50% of a real one.

BLACK LIGHT TUBES Wattage Type Finish Base Code Abbreviation Avg.Rated Hours Pack. Type Master Carton/ Inner Pack 4 T5 BL Mini bi-pin F4T5/BL 5000 Sleeve (1) 10 8 T5 BL Mini bi-pin F8T5/BL 5000 Sleeve (1) 10 15 T8 BL Mini bi-pin F15T8/BL 5000 Sleeve (1) 10 20 T12 BL Mini bi-pin F20T12/BL 9000 Sleeve (1) 6 40 T12 BL Mini bi-pin F40T12/BL/RS 20000 Sleeve (1)