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A fluorescent lamp converts electrical energy into useful light much more efficiently than an incandescent lamp. The typical luminous efficacy of fluorescent lighting systems is 50–100 lumens per watt, several times the efficacy of incandescent bulbs with comparable light output. For comparison, the luminous efficiency of an incandescent bulb ...
Bulbs used for headlamps, turn signals and brake lamps may be required to comply with international and national regulations governing the types of lamps used. Other automotive lighting applications such as auxiliary lamps or interior lighting may not be regulated, but common types are used by many automotive manufacturers.
Violet is the color of light at the short wavelength end of the visible spectrum. It is one of the seven colors that Isaac Newton labeled when dividing the spectrum of visible light in 1672. Violet light has a wavelength between approximately 380 and 435 nanometers. [2] The color's name is derived from the Viola genus of flowers.
Used as the co-official national flag; see Wiphala: Dominica: 3 November 1978: As purple sisserou parrot, a national symbol (see flag of Dominica) El Salvador: 27 May 1912: As part of the rainbow in the coat of arms (see flag of El Salvador) Nicaragua: 27 August 1971: As part of the rainbow in the coat of arms (see flag of Nicaragua) Spain: 5 ...
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A small electric current (for a 5 mm bulb diameter NE-2 lamp, the quiescent current is about 400 μA), which may be AC or DC, is allowed through the tube, causing it to glow orange-red. The gas is typically a Penning mixture , 99.5% neon and 0.5% argon , which has lower striking voltage than pure neon, at a pressure of 1–20 torrs (0.13–2.67 ...