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EPISTAR Achieves 80 lm/W Warm White LED and Expects to reach 100 lm/W in Q4 of 2009

Sep 07, 2009

Epistar Corporation

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Hsinchu, Taiwan – September 07, 2009 – EPISTAR achieves 80 lm/W warm white
LED and expects to reach 100 lm/W in Q4 of 2009.
Epistar has been developing a technology to reach high CRI and high efficacy
simultaneously. Efficacy and color rendering index (CRI) are the two major
performance merits in the lighting industry using white light LED. Usually, these two
merits work against each other and thus their combination becomes a trade-off,
especially for warm white LED. To achieve better CRI, red phosphor is needed to
compensate for the shortage of the red spectrum. However, the efficacy of existing
red phosphor is low (roughly 40 lm/W), which results in a low overall efficacy.
The newly developed product from Epistar includes one or several high-voltage
monolithically integrated DC multiple-chip arrays combined with a bridge structure
for AC drive. Several Epistar’s top performance red LED chips are incorporated into
this design to achieve high efficacy. With the help of the world-leading high
brightness red and blue LEDs, the overall efficacy is increased while high CRI is
achieved at the same time. Epistar has demonstrated a white light LED with CRI of
80, CCT at 3000K and efficacy equal to 80 lm/W. In 2009 Q4, Epistar expects to
demonstrate a new product with CRI better than 80 and efficacy of 100 lm/W at

About Epistar Corporation
Epistar Corporation, headquartered in the Hsinchu Science-based Industrial Park,
Taiwan since September 1996, focuses on developing, manufacturing and
marketing high brightness Light Emitting Diode (LED) products. Applying its own
proprietary Metal Organic Vapor Phase Epitaxy (MOVPE) technology, Epistar has
successfully commercialized the full spectrum range of high brightness LEDs with
the characteristics of compact size, low power consumption and long operation

For further information, please visit:
Press contact:
Rider Chang
Corporate Spokesperson

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