6 Pack SYLVANIA F40CWX - 40 Watt Fluorescent Tube, Cool White 4100 Kelvin, coated with Lumativ, a patented, photocatalytic coating that uses a light activated Photocatalytic process and Nanotechnology that breaks down volatile organic compounds (VOCs) and odors. LumActiv generates a superhydrophilic, self-cleaning surface. LumActiv combines photocatalytic TiO₂ and advances in nanotechnology to create the most advanced light-activated functional surface coating on the market.