Another glow plug

Industrial Retractile Extension Cords glow in the dark.
Autac, Inc.
Cords are designed with glow-in-the-dark material to improve safety for those working in dark areas. With 1 hr of light exposure, products glow for 8 hr. They are available in PVC and TPE, in 14 gauge 3 conductor and 16 gauge 3 conductor, which extend on 1:5 ratio. Cords extend only as far as necessary and have lighted plugs to alert users of live wire. Safety features include Nema 515, twist-lock, and molded plugs and strain release.