The UV-A light of 315-400 nm wavelength is not visible to human eyes, but is perceived by many species of insects that use it for orientation in flight. The 2 powerful UV-A lamps of 20 W generate a light emission of 40 W for a range of about 12 meters linearly. Also approved for being used outdoors, it does not fear rain. With security switch connected to the external grid. The model ensures unaltered quality over time and is covered by a 2-year MO-EL warranty, excluding lamps that must be replaced annually.