This Commercial Grade Socket C7 light stringer can be used with any E12 socket C7 Christmas lights outdoor or E12 globe led bulb lights for beautiful merry and bright Christmas lights c7 displays and ambient mood setting patio lights. Just screw on your desired C7 led Christmas lights outdoor Bulbs (Sold Separately) to the C7 socket wire Christmas light reel and use any C7 light clips (Sold Separately).