... proof sodium lamp Mine use sodium lamp(call lamp below for short) , blast proof, ... lamp apply for illume underground mine, that have gas etc blast dangerous filed, mainly use in tunnel, end face, chamber, ... install in a cavity, easily repare. The light source use the internatinal most advance long life, double tube core high ... : 14000h Size: 230mm diameter * 260mm Weight: 9kg Mine use blast proof Lamp