integrated mercury lamp, US
electric lamp containing in the same bulb the arc tube of a mercury vapour lamp and an incandescent lamp filament connected in series
Note 1 to entry: The bulb can be diffusing or coated with phosphors.
Note 2 to entry: This entry was numbered 845-07-21 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-94 in CIE S 017:2011.