A BASIC STUDY ON PREFERENCE OF ILLUMINANCE AND COLOR TEMPERATURE FOR TASK AND AMBIENT LIGHTING USING LED LIGHT

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  • NAKABAYASHI Saya
    Research Engineer, Institute of Technology, Shimizu Corporation, Dr. Eng.
  • SUZUKI Michiya
    Manager, Institute of Technology, Shimizu Corporation, Dr. Eng.
  • KAWASHIMA Minoru
    Deputy Director, Institute of Technology, Shimizu Corporation, Dr. Eng.
  • IWATA Toshie
    Professor., Depart. of Architecture and Building Engineering, Tokai University, Dr. Eng.

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  • LED照明を利用したオフィスのタスク・アンビエント照明におけるタスク照明の照度・色温度の選好に関する基礎的検討
  • LED ショウメイ オ リヨウ シタ オフィス ノ タスク ・ アンビエント ショウメイ ニ オケル タスク ショウメイ ノ ショウド ・ イロ オンド ノ セン コウ ニ カンスル キソテキ ケントウ

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Abstract

This study aims to assess the influence of the combination of the illuminance and the color temperature of the task and ambient lighting to the working efficiency, the subjective assessment, and the satisfaction. The subjects simulated the office work by using the task lighting which includes six combinations of illuminance and color temperature, under the two patterns of the ambient lighting. As a result, the desired task light color was ‘neutral’ under the neutral-color ambient light. Furthermore, a high correlation coefficient was found between the self-reported working efficiency and the degree of satisfaction with task lighting.

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