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Abstract
The effects of light source type and illuminance were investigated for a group of elderly subjects and a group of young subjects. Three light sources were used—a halogen source, a 3000K compact fluorescent source, and a 5000K compact fluorescent source −at three illuminances. Subjects completed a color discrimination task and several preference rating scales. Results showed that changes in illuminance produced much larger changes in subjects' performance and preference than changes in light source, and that the color discrimination performance of the elderly group was more strongly affected by illuminance than that of the young group.
