LED lamp life is very long. Like other light bulbs, LED bulbs will be time to gradually reduce the light output. But unlike other bulbs, LED bulbs will gradually turn darker and burned directly, not like any other bulb which will be suddenly broken. Inappropriate temperature, power and water vapor is the main cause to destroy the LED and determine the LED life factors.

IES another manual guide about LED light source and module –LUMENS-80-08 Measuring Lumen Maintenance of LED Light Sources specifically develop a detection LED life of the program. (and the light dimmed to how much the phase-out).

LED life is decided by the power of the number of passes a certain threshold number of hours, which is also known as lumen maintenance.

LM-80-08 manual referred to two different standards adopted by the industry, a requirement of bulb lumen less than 70% of the original is not suitable to continue to use. And the other provisions of the lumen which is lower than the original 50% will be no longer used. The first standard (L70) is adopted to general lighting LED lamps for home, while the second standard (L50) is used a decorative LED lighting. Both LED life standards developed by the Lighting Research Center of the solid-state lighting systems and Technology Alliance Team (ASSIST).

For example, a LM-80-08 Detection of LED lamps for home and claimed more than 30,000 hours, the number of lumens is still higher than 70% of the original light output by the detection of the LED samples. Which means that passing LM 80 is not only reached the basic light fades requirements, but also even better performance. LED lights inside pointed that the cost of the LM80 test project is much high, nearly about 15,000 dollars. The reason is that it should light up thousands of hours to do the light fades test parameters and precise information. The manufacturers who can afford to do this are generally medium-sized and large companies.

The new product detected by LM-80 is helpful, but it will take a longer time to do the detection because the integrity of the testing process needs to spend 6,000 hours. That is the reason why the test price of LM80 is so high.

A simple example, an LED manufacturer build a special specifications of led lamps for home and for road, and claiming that the lamp life is up to 100,000 hours, the color rendering index of 90, the power of 100 lumen’s per watt, and good illumination. A city engineer in the newspaper published the specifications of the lamps, and decided that the new highway will use this section lamps. But engineers made decisions to be okay? Any information to ensure that the lighting characteristics are described by the manufacturer to conform to the facts?

Changed the entire lighting market to led lamps for home replace the buildings and streets on the original halogen and fluorescent lamps(CFLs). Engineers often compare led lamps for home with different manufacturers. But how to ensure that engineers select the most suitable lighting?

LED Test Manual Guide

Illuminating Engineering Society(IES) is a non-profit organizations, publications as a reference for lighting applications and scientific. The ASHRAE / the IES Standard 90.1 and Standard 189 is also a partner sponsor. The Association published a lot of lighting, energy-related documents.

IES have many manual guide. It can help engineers to clearly identify the authenticity of the LED lighting quality. A manual for the LED LUMENS-79-08 Electrical and Photometric, the legislation provides a set of test LED products,  the standard procedure. The manual explain the test lumen, luminous power, lighting intensity(candle light), lighting, directional color temperature and color rendering index (but only limited to the LED lighting does not include the LED chip packages and modules.)

LM-79-08 manual develop the test environment and changes in parameters (such as ambient temperature), and also record the test data of each LED lighting products, such as testing agency, testing dates and post-test performance data, if not, it can also keep the statement of uncertainty.

Lighting power account is to calculate by the number of lumen’s per watt generated(the amount of light). In the past few years, LED power continue to increase from 50 lumen per watt to 130 lumen. Usually the running for Cold White LED is more efficient than warm white LED. In contrast, the lower the power of traditional lighting. Incandescent bulb will produce 15 lumen per watt. CFL produces 60 lumen per watt, fluorescent lamps produce 100 lumen, while the high-end metal halide produces 100 lumen per watt.