Emergency vehicle warning lights: state of the art, Issue 480, Part 16
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The Present Chaos
Peripheral Functioning of the Eye
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abbreviation angular intensity distribution approximately axis background beamspread blue lights bright candelas color temperature color-matching functions colorimeter cone conspicuity corresponding cycles dark device direction distance driver effective intensity electrical emergency vehicle warning energy figure filters flash duration flash rate flashing light flux fovea frequency Fresnel lens gaseous discharge goniometer green horizontal illuminance incandescent lamp lens lenses light signal light source limit luminous efficiency function luminous flux luminous intensity measure mirror motion normal observer observer's oscillating output pattern peak intensity permit photocell photometer photometric photopic photosensor physical pulse shape radiant radiant intensity range reaction red light reflector relative response retina scotopic Scotopic vision sealed beam seen sensitivity signal light solid angle specified spectral power distribution standard lamp STERADIAN stimulus surface term transmittance tristimulus values unit usually variables vehicle warning lights vertical viewing conditions visible vision visual wavelength yellow