Effects of Newly Developed LED Lighting on Living Comfort in an Indoor Environment (Part 2)

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  • 新開発 LED 照明の室内環境快適性に及ぼす効果（第 2 報）
  • 新開発LED照明の室内環境快適性に及ぼす効果(第2報)日中作業後休息時における使用
  • シン カイハツ LED ショウメイ ノ シツナイ カンキョウ カイテキセイ ニ オヨボス コウカ(ダイ2ホウ)ニッチュウ サギョウ ゴ キュウソクジ ニ オケル シヨウ
  • —Use during a Rest Period after Daytime Work—
  • ―日中作業後休息時における使用―

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Abstract

Objective: We conducted a clinical study to investigate the effects of newly developed LED lighting on living comfort in an indoor environment.<br> Design: Twenty healthy subjects participated in a randomized crossover trial. They performed a mental task for 4 hours under ordinary lighting, and then rested for 1 hour under newly developed lighting or ordinary lighting. Sixteen of the subjects (8 males, 8 females) completed the trial. We evaluated subjective comfort using a visual analogue scale (VAS) and measured autonomic nervous system effects by the frequency analysis of a-a intervals on accelerated plethysmography (APG) waves.<br> Result: The subjects’ VAS evaluations showed that the newly developed lighting increased their comfort, while frequency analysis of APG during the rest period was found to activate the parasympathetic nerve system.<br> Conclusion: This newly developed LED lighting produces suitable illumination and color temperature and is useful for improving living comfort in an indoor environment during a rest period after daytime work.<br>

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