Replacement Globe Light Bulb, G50, 7W/130V, E17 Base, Clear, 25 Pack Screw base diameter is 5/8" (17mm). This lamp has an INTERMEDIATE base. This will fit in a C9 (E17) socket, NOT C7. Please verify this is the correct size. Light bulb diameter (glass portion) is 2" 7 Watts, 130 Volts (Incandescent) Pack of 25 CLEAR light bulbs Screw socket diameter is 5/8" - PLEASE BE SURE TO ORDER CORRECT SIZE