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ILLUMINATING ENGINEERING SOCIETY
WEST THIRTYNINTH STREET
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accident experience adequate approximately automobile automobile headlights average beam Better Light Better Light—Better Sight brightness cadmium candlepower cathode ceiling cent Chicago circuits City Cleveland color color temperature Committee Company cost curve daylight decorative Edison effect efficiency Electric electrodes energy factor feet fixtures foot-candles foot-lamberts glare heat high-intensity mercury highway lighting Illuminating Engineering Society incandescent lamp increase industrial intensity interest interior light sources lighting equipment located lumens luminaires luminous Mazda lamps meeting ment mercury arc mercury lamp mercury-vapor lamp metal-vapor lamp miles motor vehicle mounting height Nela Park night accidents night fatalities object obtained Ohio operation Optometrists pedestrian practice present radiation reflectors road roadway Route 25 safety Section shown sodium lamp spacing street and highway street lighting surface thyratron tion transmission tube visibility voltage walls watt wave-length York York City