SAN JOSE, CA — Philips Lumileds continues to advance its core LED technology and
recent breakthroughs implemented in the latest LUXEON Rebel LEDs for illumination
applications improve efficacy and light output performance at luminaire operating
temperatures. Hot / Cold Factor compares the light output of the LED at 100°C Tj and at
25°C Tj—which is how LEDs are specified on a datasheet. LEDs in a luminaire are
operated at very high junction temperatures, often between 80°C and 110°C. As
temperature increases, light output and efficacy decrease. With a Hot / Cold Factor of
0.93, the just released LUXEON Rebel LEDs deliver more light and better efficacy than
virtually any other power LED. Typical Hot / Cold Factors range from 0.80 - 0.85 at
junction temperatures of 100°C. Maximizing this factor is critical as companies design
solid-state lighting solutions that are intended to meet ENERGY STAR requirements.
“Hot / Cold Factor is one of the clear differentiators between LEDs,” said Rudi
Hechfellner, Director of Technical Solutions. “A high HC Factor can simplify the thermal
system design and lower the cost per lumen in the final application.”
Hot / Cold Factor charts for all LUXEON Rebel LEDs are available from the datasheets
published at www.philipslumileds.com.
For More Information Contact:
Director of Marketing Communications
+1 408 964 2695
About Philips Lumileds
Philips Lumileds is the world's leading provider of power LEDs for illumination solutions.
The company's leading light output, efficacy and thermal management are direct results
of the ongoing commitment to advancing solid-state lighting technology and enabling
lighting solutions that are more environmentally friendly, help reduce CO2 emissions and
reduce the need for power plant expansion. Philips Lumileds' LUXEON LEDs are
enabling new solutions for shop, outdoor, office, school, and home lighting applications.
More information about the company's LUXEON LED
products and solid-state lighting technologies can be found at www.philipslumileds.com.
About Royal Philips Electronics
Royal Philips Electronics of the Netherlands (NYSE: PHG, AEX: PHI) is a diversified
Health and Well-being company, focused on improving people’s lives through timely
innovations. As a world leader in healthcare, lifestyle and lighting, Philips integrates
technologies and design into people-centric solutions, based on fundamental customer
insights and the brand promise of “sense and simplicity”. Headquartered in the
Netherlands, Philips employs approximately 116,000 employees in more than 60
countries worldwide. With sales of $38 billion in 2008, the company is a market leader in
cardiac care, acute care and home healthcare, energy efficient lighting solutions and
new lighting applications, as well as lifestyle products for personal well-being and
pleasure with strong leadership positions in flat TV, male shaving and grooming,
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