petromax
/ˈpɛtrəmaks/noun
A trademark for: a type of vaporized paraffin pressure lamp; (usually now applied to) a portable lantern of this kind.
Origin
1920s. From German Petromax from Petro- (in Petroleum; compare petro-) + Max, male forename, after Petroleum-Maxe, the nickname of the German inventor Max Graetz, who developed and marketed this lamp from 1910.