Blacklight BL368 ultraviolet UV PLS light bulbs emit radiation between 300-460nm.Their main applications are for use in flying insect light traps/fly killers and photochemical processes. Also used for accelerating the drying of varnish in printing and nail salons.Fitted with a G23 2-pin (23mm apart) square push fit base.Please note that these replace the older BL350. This is the replacement light bulb for the Bower Plug-In unit. We recommend that you change UVa light bulbs every 12 months to maintain efficiency.Need more help in choosing a suitable ultraviolet light bulb or tube? Read our guide Choosing Ultraviolet Bulbs UVA, UVB and UVC