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Present Status of Energy Saving Technologies and Future Prospect in White LED Lighting

This paper describes the present status and future prospects on the efficient energy‐saving lighting system based on white light‐emitting diodes (LEDs) technologies. Three types of white LEDs are introduced in terms of the fundamental lighting properties which are related to the improvement in luminous efficacy and color rendering. Practical applications using the efficient white LED lighting system are demonstrated. Copyright © 2007 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.