JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
Online ISSN : 1349-838X
Print ISSN : 0019-2341
ISSN-L : 0019-2341
Development of LED Illuminations (1) : Outline of LED Illuminations(<Special Issue>Field of Luminescent Materials Part 1 : Field of Various Solid Atate Luminescent Materials)
Kanji Bando
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JOURNAL FREE ACCESS

2008 Volume 92 Issue 6 Pages 301-306

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Abstract
The efficiency of the white LED unit reached 150 lm/W, the highest value of the white light sources for general lighting. For the phosphors for LED, too, new material was developed, and improvement in color rendering properties is taking place. With a rapid improvement in performance for a background, practical application of LED lighting has been brought into view.
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© 2008 The Illuminating Engineering Institute of Japan
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