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Terms for subject Lighting (other than cinema) (1011 entries)

radians	radiance (in a given direction, at a given point of a real or imaginary surface)
radianskoeffisient	radiance coefficient (at a surface element of a medium, in a given direction, under specified conditions of irradiation)
radiometer	radiometer
redningslampe	mine rescue luminaire
referansebelysning	reference lighting
refleksjon	reflection
reflektans	reflectance (for incident radiation of given spectral composition, polarization and geometrical distribution)
reflektansfaktor	reflectance factor (at a surface element, for the part of the reflected radiation contained in a given cone with apex at the surface element, and for incident radiation of given spectral composition, polarization and geometrical distribution)
reflektorlampe	reflector lamp
regulær refleksjon	specular reflection
regulær transmisjon	direct transmission
regulær transmittans	regular transmittance
relatert farge	related (perceived) colour
relativ fargestimulusfunksjon	relative colour stimulus function
relativ opphengslengd	suspension factor (of an installation in an interior)
relativ responsivitet	relative responsivity
relativ spektralfordeling	relative spectral distribution (of a radiant, luminous or photon quantity)
rellativ del av nedoverretta lysfluks	cumulative downward flux proportion (of a source, for a solid angle)
reservebelysning	stand-by lighting
resonanslinje	resonance line