. Electric railway journal . A i T O T\ V NEW YORK MUNICIPAL CAR—FIGS. 12, 13 AND 14—ARRANGEMENTS AND TYPE OF LIGHTS Fig. 12 shows an indirect fixture with three 3fi-watt tungsten lamps (see Fig. 6). Fig. 13 shows semi-indirect lighting with two 94-watt and one 10-watt lamp per bowl. Fig. 14 shows tungsten lamps and special curved white glass screens. March 27, 1915] ELECTRIC RAILWAY JOURNAL 617. NEW YORK MUNICIPAL CAR—FIG. 15—LIGHTING EFFECTOF INSTALLATION SHOWN IN FIGS. 1 AND 9 There were two 94-watt lamps and one 10-watt emer-gency lamp in each bowl. The bowls were hinged toallow lowering f
. Electric railway journal . A i T O T\ V NEW YORK MUNICIPAL CAR—FIGS. 12, 13 AND 14—ARRANGEMENTS AND TYPE OF LIGHTS Fig. 12 shows an indirect fixture with three 3fi-watt tungsten lamps (see Fig. 6). Fig. 13 shows semi-indirect lighting with two 94-watt and one 10-watt lamp per bowl. Fig. 14 shows tungsten lamps and special curved white glass screens. March 27, 1915] ELECTRIC RAILWAY JOURNAL 617. NEW YORK MUNICIPAL CAR—FIG. 15—LIGHTING EFFECTOF INSTALLATION SHOWN IN FIGS. 1 AND 9 There were two 94-watt lamps and one 10-watt emer-gency lamp in each bowl. The bowls were hinged toallow lowering for cleaning and lamp replacement. Thebowls were suspended with their tops located 12 the center of the ceiling. The illumination fromthis system was very uneven, being high directly underthe units and low between them (Fig. 5). The averageintensity was and foot-candles at normal and 85per cent voltage respectively; watts per square , effective lumens per watt , and effective utiliza-tion efficiency per cent. To determine the effect of the shape of the ceiling onthe light distribution, a special headlining consisting ofa white enameled insert, having a 3-ft. span on an , was inserted and the test repeated (Fig. 16).This raised the average foot-candles to and atnormal and 85 per cent voltage respectively, effectivelumens per watt to
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