Sunlight and LED hybrid illumination in indoor lighting design

Chih Hsuan Tsuei, Wen Shing Sun

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


We present a hybrid sunlight and light-emitting diode (LED) lighting system design for indoor illumination. Sunlight is collected by a set of sunlight concentrator and then split into visible and non-visible rays by a beam splitter. The visible rays pass through the light guide into a light box. The sunlight and LED light are combined and made uniform by the light box, if the sunlight is not bright enough, some of these 140 LEDs can be turned on to maintain indoor illuminance above the standard level. When nighttime comes, all the LEDs can be turned on to illuminate the indoor space. The lighting system can let the lighting environment green and comfortable. Our simulation of the illumination system shows that the efficiency of the sunlight and LED hybrid lighting combination is better than that of LED and traditional lighting systems.

Original languageEnglish
Title of host publicationInternational Optical Design Conference 2010
StatePublished - 2010
EventInternational Optical Design Conference 2010 - Jackson Hole, WY, United States
Duration: 13 Jun 201017 Jun 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceInternational Optical Design Conference 2010
Country/TerritoryUnited States
CityJackson Hole, WY


  • LED
  • Lightbox
  • hybrid lighting
  • illuminantion
  • sunlight
  • sunlight collector


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