Ultraviolet Light A field engineer for FAR UV Technologies installs an ultraviolet light in the Arkansas Air National Guard’s 189th Operations Group ceiling Jat Little Rock Air Force Base, Ark., July 16, 2020. The UV lighting is environmentally friendly and mercury-free. SHARE IMAGE: Download Image: Full Size (1.17 MB) Photo By: Air Force Master Sgt. Jessica Roles, Arkansas Air National Guard VIRIN: 200716-Z-HN461-0004M.JPG Photo Gallery