UV EMITTING UPPER AIR DISINFECTION DEVICE

The invention provides a light generating system (1000) comprising n1 light generating devices (100) and optics (400), wherein: - the n1 light generating devices (100) are configured to generate device light (101) having a wavelength selected from the wavelength range of 100 to 380 nm; wherein n1≥1; wherein the n1 light generating devices (100) comprise one or more laser devices; - the n1 light generating devices (100) and optics (400) are configured to generate k1 beams (105) of device light (101), wherein each beam (105) has a first beam angle (θ1) and perpendicular thereto a second beam angle (θ2), wherein the first beam angle (θ1) and the second beam angle (θ2) are defined by a full width half maximum of the beam (105), wherein one of the first beam angle (θ1) and the second beam angle (θ2) is selected from the range of at least 5° and the other one of the first beam angle (θ1) and the second beam angle (θ2) is selected from the range of at maximum 2°; wherein k1≥1; and - the light generating system (1000) is configured to generate system light (1001) comprising at least one beam (105) of device light (101).