File:Carbonfilament.jpg

DescriptionCarbonfilament.jpg carbon filament lamp, grey coloured bulb results from sublimated carbon, which has been deposited at the inner glass surface

hour isapproximately 30 per cent less than the ordinarj 16-candlepower carbonfilament lamp, the high intensity obtained on the work is truly remarkable,and

hour isapproximately 30 per cent less than the ordinarj 16-candlepower carbonfilament lamp, the high intensity obtained on the work is truly remarkable,and

metal filament lamps have an inher-ently better regulation than the carbonfilament lamps; a change of 3 volts on aMazda lamp alters the candle-power nomore