Effects of Newly Developed LED Lighting on Living Comfort in an Indoor Environment (Part 2)
10.1625/jcam.9.137
- VernacularTitle:新開発 LED 照明の室内環境快適性に及ぼす効果（第 2 報）
- Author:
Osami KAJIMOTO
;
Yukishige SHIRAICHI
;
Masaki OHTSUKA
;
Takanori KADOWAKI
;
Tomohiro SUGINO
- Publication Type:Journal Article
- Keywords:
LED lighting;
indoor environment;
fatigue;
autonomic nervous system;
accelerated plethysmography
- From:Japanese Journal of Complementary and Alternative Medicine
2012;9(2):137-147
- CountryJapan
- Language:Japanese
-
Abstract:
Objective: We conducted a clinical study to investigate the effects of newly developed LED lighting on living comfort in an indoor environment.
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.
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.
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.
