Magnesium torch

They were also used in the 1950s up to the early 1970s as a light source for scuba diving, and were featured occasionally in television shows.

For railway emergency lighting and signalling purposes, the torch may consist of a rolled cardboard structural tube with plastic end covers, one of which may be the ignition device.

The fuel is inside and exposed by removing the top end cap.

The range of explosive mixtures of hydrogen and air or oxygen is unusually wide, but varies with temperature, pressure and other factors.

[6] A magnesium torch does not necessarily give warning of an atmosphere that cannot support life or consciousness, as it continues to burn underwater, or in an oxygen free atmosphere if sufficient nitrogen or carbon dioxide are present.