Daylight efficiency of artificial illuminants . ry screening point. The white lightefficiency, however, furnishes information of importance in theconsideration of artificial illuminants, namely, on the merits of a Ives.] Daylight Efficiency of I Ruminants. 245 source for the purpose of illuminating colored objects. A methodto include both values would be superior to either alone, and anattempt to do this graphically is given in Fig. 4, in which some ofthe results of Table III are embodied. The rectangles indicatethe white sensation efficiencies of the several sources, the shadedportions of the
Daylight efficiency of artificial illuminants . ry screening point. The white lightefficiency, however, furnishes information of importance in theconsideration of artificial illuminants, namely, on the merits of a Ives.] Daylight Efficiency of I Ruminants. 245 source for the purpose of illuminating colored objects. A methodto include both values would be superior to either alone, and anattempt to do this graphically is given in Fig. 4, in which some ofthe results of Table III are embodied. The rectangles indicatethe white sensation efficiencies of the several sources, the shadedportions of the rectangles the white light efficiencies. The verticallines and scales give the dominant hues. Inspection of thefigures will show that they demonstrate in a rather striking waythe relative qualities of the sources from the standpoint of theircolor. A light of the type of II, for instance, is one of bluish hue,of about 80 per cent white sensation, but a source not suited forcolor discrimination; a light of the type of III is one of yellowish .5. 7/A .4 .5 .6 .Ijx A .5 .Ifi .4 .5 .6 .Ifj. MERCURY ARC
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