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March 1941 NUMBER
April 1941 NUMBER
PUBLISHED MONTHLY EXCEPT AUGUST AND OCTOBER BY
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application architectural average beam Bldg brightness building Calif ceiling cent Chapter Chicago Cleveland color system color temperature Committee Commonwealth Edison curves Day-Brite Lighting daylight designed distribution drying lamp Edison Company effect efficiency Electric Company feet filament fixtures fluorens fluorescent lamps fluorescent lighting footcandles footlamberts glare glass heat Illuminating Engineering Society incandescent industrial installations level of illumination light sources lighting equipment luminaires luminous manufacturers materials measured ment mercury meter method mounting heights near-ultraviolet radiation Nela Park night Ohio operation paper pavement pedestrian Philadelphia plane plant presented Presiding Officer produce R. A. Miller radiant energy recommended reflection factor reflectors region Residence Lighting ribbon roadway School Lighting Section CHAIRMAN Service specification spectral spectrum standard street lighting surface Table tests tion traffic safety tristimulus tunnel ultraviolet units values various visibility W. L. Cross watts wavelength windowless wiring York Section