. Electric railway journal . l i NEW YORK MUNICIPAL CAR—PIGS. 4, 5 AND 6—DISTRIBUTION OF LIGHT AND EFFECTIVE ILLUMINATION Fig 4 shows an installation of indirect reflectors set in coves, ten on each side of car, and five 10-watt frosted emergency lampsalong center line of car, set in ceiling rosettes. Fig. 5 shows a semi-indirect installation of two !)4-watt (horizontal) lamps and one 10-watt (vertical) lamp for each of five units. Fig. 6 shows an indirect installation comprisingtors with three 36-watt, 115-volt lamps per unit. eight whits enameled steel indirect reflec- in Fig. 1. Ten reflect
. Electric railway journal . l i NEW YORK MUNICIPAL CAR—PIGS. 4, 5 AND 6—DISTRIBUTION OF LIGHT AND EFFECTIVE ILLUMINATION Fig 4 shows an installation of indirect reflectors set in coves, ten on each side of car, and five 10-watt frosted emergency lampsalong center line of car, set in ceiling rosettes. Fig. 5 shows a semi-indirect installation of two !)4-watt (horizontal) lamps and one 10-watt (vertical) lamp for each of five units. Fig. 6 shows an indirect installation comprisingtors with three 36-watt, 115-volt lamps per unit. eight whits enameled steel indirect reflec- in Fig. 1. Ten reflectors were equipped with 56-wattclear bulb tungsten lamps and four with 10-watt clearbulb tungsten emergency lamps. The light distribution,Fig. 1, was good, though it had points of high intensityunder the emergency lamps, due to the small lamp inthe large reflector. No bare lamp filaments were visiblealong the normal line of vision. The efficiency of the. h H / > / / / -r> r \ I Z 3 4 3 6 7 6 S i9 // /t /& f4 /& /tf /7 NEW YORK MUNICIPAL CAR—FIG. 7—CHART SHOWINGDISTRIBUTION WITH COVE LIGHTING (SEE FIG. 17) square foot. There were effective lumens per wattand the effective utilization efficiency was per utilization efficiency in an ordinary dark yellow carwith similar equipment is about 30 per cent, showingthe great advantage of the white enamel interior finish. No. 2.—The second test, Fig. 2, was similar to thefirst, except that clear prismatic reflectors were used. f*rto roz-rrrf? 5 /w TOO MSL/<$h 77/v<f Uw rs
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