Answer: Dirty
A _______ headlight lens can cut the amount of light it emits by 90%
Fri Jan 02 2004 13:30:00 GMT-0500 (Eastern Standard Time) · A headlamp is a lamp attached to the front of a vehicle to illuminate the road ahead. Headlamps are also often called headlights but in the most precise usage headlamp is the term for the device itself and headlight is the term for the beam of light produced and distributed by the device.. Headlamp performance has steadily improved throughout the automobile age spurred by the great ...
Luminous efficacy - Wikipedia
OLED - Wikipedia
Ultraviolet - Wikipedia
Luminous efficacy - Wikipedia
Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm (with a corresponding frequency around 30 PHz) to 400 nm (750 THz) shorter than that of visible light but longer than X-rays.UV radiation is present in sunlight and constitutes about 10% of the total electromagnetic radiation output from the Sun.It is also produced by electric arcs and specialized lights ...
An organic light -emitting diode (OLED or organic LED) also known as organic electroluminescent (organic EL) diode is a light -emitting diode (LED) in which the emissive electroluminescent layer is a film of organic compound that emits light in response to an electric current. This organic layer is situated between two electrodes; typically at least one of these electrodes is transparent.
Wed May 04 2005 14:30:00 GMT-0400 (Eastern Daylight Time) · Luminous efficacy is a measure of how well a light source produces visible light . It is the ratio of luminous flux to power measured in lumens per watt in the International System of Units (SI). Depending on context the power can be either the radiant flux of the source's output or it can be the total power (electric power chemical energy or others) consumed by the source.
Radial keratotomy (RK) is a refractive surgical procedure to correct myopia (nearsightedness) that was developed in 1974 by Svyatoslav Fyodorov a Russian ophthalmologist.It has been largely supplant...

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