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.