LONGEVITY OF MODERN ELECTRIC /;. LAMPS, z Since the introduction of metallic ■ filament electric lamps,,: some' .interesting facts concerning their useful burning life have been demonstrated. We have, however, just received information showing Tl "record that the manufacturers of theOsram metallic filament lamp may well be proud of, i.e., that in the Kilbirnie Tunnel several Osram lamps liavo been -burning for ovor 10,000 hom-s. AVhenono considers that only a year or so. back wo were content. with a life of from GOO-800 hours with the carbon filament lamps, the above record is wonderful, and fully demonstrates what great -'improvements have recently taken place in the mt(nuJaoture of electrio lamps.—Advt.'
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Dominion, Volume 4, Issue 934, 29 September 1910, Page 6
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108Page 6 Advertisements Column 1 Dominion, Volume 4, Issue 934, 29 September 1910, Page 6
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