Philips Flexo Print TL 100W/10-R UV-A Fluorescent Light Bulb (9280 069 01029)TL 100W/10-R UV-A*** UPC 8711500612816 is for 1 pc From PHILIPS ****** UPC 8711500612823 is for Carton with 25 pcs From PHILIPS ***Flexo print TL lamps emit almost all of their light (99.9%) in the useful UVA and visible blue wavebands - between 350 and 400 nm - and have peak intensity at 370 nm (except for the /03 version). This makes them ideal for flexoprinting equipment and photopolymerization processes. In addition, the `R' lamps in the family have an internal 200-degree reflector to further optimize the lamp's overall efficiency.