| 单词 | halfwatt |
| 释义 | > as lemmashalf-watt half-watt adj. now historical designating a gas-filled incandescent lamp consuming approximately half a watt of electrical power per candlepower of light produced. ΘΠ the world > matter > light > artificial light > an artificial light > artificial light defined by light-source > [adjective] > incandescent (of lamp) > of specific power half-watt1913 1913 Lighting Jrnl. Aug. 207/1 (heading) A half watt lamp!.. The types which it is expected to first develop..operate at an efficiency of half a watt per candlepower. 1932 N. Royde-Smith Incredible Tale 57 The white glare of the half-watt lamp hanging from the studio roof. 1980 Technol. & Culture 21 466 Only after Auer von Welsbach had invented a superior incandescent light bulb, the Osram ‘half-watt lamp’.., did the electrical lighting system gain a decisive edge over gas. half-watt half-watt adj. Electr. applied to a gas-filled incandescent lamp consuming approximately a half-watt per candle-power. ΚΠ 1913 Lighting Jrnl. 1 207/1 (heading) A half watt lamp!.. The types which it is expected to first develop..operate at an efficiency of half a watt per candlepower. 1915 Nature 9 Dec. 407/1 With electricity generated in modern power-houses, and ordinary metal filament lamps, 750,000 candle-power-hours are generated per ton of coal, compared with 260,000 c.p. per ton of coal when gas and modern gas mantles are used. The extended use of so-called ‘half-watt’ lamps will soon double this 750,000. 1932 N. Royde-Smith Incredible Tale 57 The white glare of the half-watt lamp hanging from the studio roof. < as lemmas |
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