Plug the hole with wax or silicone, then screw the bulb into a socket and let someone walk into the room and throw the switch.
把那个洞用蜡或硅酮封住，之后把灯泡重新旋入插座，静候等某人走入房间，打开开关。
2
A casting kit might include multiple casting compounds (dental gypsum, Silicone rubber), snow wax (for making a cast in snow), a bowl, a spatula and cardboard boxes to hold the casts.