"Philips Actinic BL PL-L 36W/10/4P Secura Fluorescent Tube Black Light (9279 091 21001)PL-L 36W/10/4P SECURA 1CT/25*** UPC 8718291194439 is for 1 pc From PHILIPS ****** UPC 8718291194446 is for Carton with 25 pcs From PHILIPS ***With an optimized spectrum matching the eye sensitivity of the housefly, Actinic BL PL-L Secura lamps are perfect for attracting insects. With the compact PL-L product format in a variety of wattages, new attactive designs are possible. Furthermore, these lamps 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