"Philips Actinic BL TL-D TL-D 18W/10 Secura Fluorescent Tube Black Light (9280 482 01003)Actinic BL TL-D 18W/10 Secura 1SL/25*** UPC 8727900853834 is for 1 pc From PHILIPS ****** UPC 8727900853841 is for Carton with 25 pcs From PHILIPS ***With an optimized spectrum matching the eye sensitivity of the housefly, Actinic BL TL-D(K) Secura lamps are perfect for attracting insects. They have virtually no UV-B output, and so are perfectly safe. In addition, they have a special "Secura" sleeve that keeps all glass and components together in the case of accidental breakage. This eliminates the risk of glass splinters showering down on food preparation areas