Ledzworld

A trusted online platform that connects 120,000 credible suppliers verified by renowned authentication companies. Established by Hong Kong Trade Development Council, hktdc.com attracts 1,000,000 worldwide buyers to source products and services provided by Hong Kong, Asian and China manufacturers & suppliers.

Come join us at our booth at the Hong Kong Lighting Fair 2010, Hall 5c, Booth Number 5C-A13.

Ledzworld’s professional retrofit lamps contain LEDs that are LM80 compliant. Cree Test Reports are available upon request.

MCE XPE XPG

What Every Customer Should Know About Lumen Maintenance

• Guidance on how to achieve 50,000 hour LED lifetime that cannot be explained with a single number
• Temperature and current are critical parameters
• T_j (junction temperature) and I_f (forward current) are not the only parameters that affect long-term lumen maintenance
• Higher ambient air temperatures accelerates the LED lumen degradation over time
• SSL industry now has a standard for long-term LED life testing: IESNA LM-80

IESNA LM-80

• The IESNA has published the definitive method for long term lumen maintenance testing of LED lamps – a method that is now THE INDUSTRY STANDARD
• IESNA LM-80-08, “Measuring Lumen Maintenance of LED Light Sources” requires testing of LED lamps at two air temperatures: 55^oC and 85^oC. The base of the lamp (solder point temperature) must also be held at these two temperatures
• It also allows LED manufacturers the flexibility to test the lamps at a third temperature that will represent another condition in which the lamps may be used
• The US Department of Energy recognizes the validity of this method and requires it to be used for all luminaires that are Energy Star compliant

Projecting Long-Term Lumen Maintenance

• The Alliance for Solid-State Illumination Systems and Technologies (ASSIST) in the U.S. recommends a method for extrapolating long term lumen maintenance of LED
• The ASSIST recommendation is to test LED for a minimum of 6000 hours
• An exponential curve is then fit to the 1000 hour data point and the 6000 hour data point and projected forward to model the light degradation of the LED

We have built a hotel corridor in our showroom as this is usually the only area in a building that has no daylight and, therefore, needs artificial lighting. We installed light fixtures, and fitted different lamp types so the different lighting solutions can be compared in the same corridor.