Artificial Illumination by Fluorescent Lamps Clinical Part II Ishihara's Charts and Fluorescent Lamps

Reading tests were made with Ishihara's Charts (10th edition) under incandescent lamps, daylight fluorescent lamps. de luxe daylight fluorescent lamps, mixed light of daylight fluorescent lamps and incandescent lamps, and neutral daylight. The result was as follows: The reading accuracy was highest under the de luxe daylight fluorescent lamp, and neutral daylight. the daylight fluorcscent lamp, mixed light of the daylight fluorescent and the incandescent lamps followed in this order with slight differences, and the incandescent lamp was the lowest.