A.L.P Lighting & Ceiling Products, Inc. is one of the worlds largest manufacturers of lenses, diffusers and louvers for fluorescent fixtures. As such, you can always be assured of quality, proper fit and service. Do business with a company you can trust. A.L.P replacement plastics, wraparound lenses and diffusers for fluorescent fixtures… easy to order… usually in stock! We can fulfill you needs from one wraparound to hundreds.