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Abstract
This study was carried out to explore satisfaction with light levels when these are set with user-control over light level. Two ranges of illuminance were used, having maximum illuminances of 500 and 700 lux. Previous work has demonstrated that the lower range would lead to lower settings of preferred illuminance: this work was carried out to compare ratings of satisfaction with light levels set using different ranges. Results of the illuminance adjustment task demonstrated that the lower range lead to significantly lower illuminances. Results of the ratings of satisfaction with light level did not suggest a difference in satisfaction with the low and high ranges despite the significant difference in illuminances. These results suggest that occupants would set a lower light level when presented with a lower illuminance range and that they would be equally satisfied with this lower light level than if they had set a higher illuminance under a high illuminance range. This suggests the potential to reduce energy consumption without reducing satisfaction.