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.