2 pages matching micro-reciprocal-degree date:0-1960 in this book
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Polar CurveConical DistributionIsocandle DiagramIllum
21 other sections not shown
artificial light beam calculation candelas ceiling coefficient colour colour temperature cut-off daylight diagram diffusing direct lighting discharge lamps discomfort glare distance effect efficiency energy equipment example film floodlighting fluorescent lamps flux emitted foot-lamberts ft-L give given glass H G F H.P.M.V. lamps horizontal Ilium Illuminating Engineering important intensity lanterns lens less light distribution light output light source lighting fittings lighting installation Lond London louvres lumens luminance luminous flux luminous intensity measurement mercury method mounting height non-cut-off normal object obtained parabolic trough photometer photometry plane polar curve prisms projector radiation ratio reflection factor reflector right angles Room Index runway shown in Fig shows sky factor solid angle spectral specular reflection streetlighting Table temperature tion traffic Trans trichromatic tubular fluorescent lamps tungsten filament lamps unit values vertical visible vitreous enamel voltage wattage wavelength window