LEVITON, LINEAR FLUORESCENT LAMP HOLDER, 13351, 660 WATT, 600 VOLT, LOT OF 6 : IRONTIME SALES INC.
LEVITON, STANDARD FLUORESCENT LAMP HOLDER, 390-1W, 660 WATT, 600 VOLT, LOT OF 6 : IRONTIME SALES INC.
EATON Wiring S865W-SP-L 660-Watt, 250-Volt Two Piece Plastic Ceiling Receptacle Lamp Holder with Pull Chain and Outlet, White - Light Sockets - Amazon.com
CHALLENGER - 9205 - 84888-0 - Fluorescent/LED Tube Lamp, Socket, Medium Base T8, T10 & T12, 600V 660 watt.
this Leviton gooseneck-lamp my grandma gave me, pretty sure it's from before or during WW2. it's rated for 660 watts and 250 volts, made in USA. : r/BuyItForLife
Jandorf Lamp Push Through Socket, Medium Base, Brass, 660-Watt, 250-Volt | West True Value