Master electrician, 50' 12/3 sjtw, yellow cord temporary lighting with 5 molded light sockets, plastic lamp guards, 3 prong plugs 5-15p, durable, indoor/outdoor lighting systems accommodate standard 23 bulbs up to 150w, lamp socket every 10', rugged & heavy duty, rated to 300v, plug rated to 15a, standard shape 5-15r, outlet receptacle on the end to interconnect more than 1 set, plastic lamp guards snap on easily, for concerts, parties, outdoor events, construction lighting & commercial lighting, also known as string lights.