Bayonet Cap (BC) [B22]. This bulb will not work in 110/240V sockets.
Leyton Lighting ET60FLY 10w - 60w 12v Low Voltage Halogen Transformer Fly Lead
10w - 60w 12v Low Voltage Halogen Transformer Fly Lead ET60FLY
12x 60W 12V Low Voltage GLS Clear Dimmable ES E27 Edison Screw Light Bulb Lamp
2x 60W 12V Low Voltage GLS Clear Dimmable ES E27 Edison Screw Light Bulb Lamp
OHMTRONIC AELEDP/60W LED DRIVER 25V-40VDC 60W
2x 18W (=100W) GE GX24q-2, 4 pin, Low Energy CFL Light Bulb 3500K 835 White