Electric lamp with double loop carbon filament and spherical bulb made by the Swan United Electric Light Co. Ltd

Carbon filament electric lamp marked Brush Vienna, 115 volt, 8 c.p., 3 1/2 watt, on glass envelope

Ediswan vacuum electric lamp and a holder, with a glass envelope containing a ribbon filament, made for the Cumbrae Lighthouse, c.1901

Ediswan vacuum electric lamp, with a glass envelope containing a folded ribbon filament, used in the Cumbrae Lighthouse, c.1901

Miner's electric hand lamp, by Oldham and Son Ltd of Denton, Manchester, with the casing cut away to expose the inner workings

Bull's Eye miner's electric hand lamp, type E.L.E., by Oldham and Son Ltd of Denton, Manchester

Wheat miner's electric hand lamp, type Q.L.E., by Oldham and Son Ltd of Denton, Manchester

Electric lighthouse lamp in a lamp holder, 1000 watt, tungsten filament, incandescent

Electric lighthouse lamp, 2250 watt, cruciform tungsten filament, incandescent, and 'cap up' burning

Electric lighthouse lamp, 4000 watt, double star tungsten filament, incandescent, and 'cap down' burning