Rational view of the road to promote the uneven lighting LED

Trying to impose the latest technology on infrastructure that has been developed for more than a century is not easy. Some of these issues have been or will be resolved, but there are still some challenges, many of which will bring challenges to those who already have answers. Several potential issues to be addressed are price, color quality, thermal management, and user training. Because most of these problems are not technical problems, it is not necessary for the design engineer to understand them if they do not face them directly. These issues are varied depending on what new lighting bulbs or custom LED lighting fixtures are designed by the supplier.

LED new bulb

The United States government regulations since 2012 will ban the incandescent lamp above 100W, a compact fluorescent lamp is projected to become the first beneficiaries of this ban. But people want to know that just because of the economic benefits of small fluorescent lamps than incandescent energy saving, consumers do not completely change the reasons for the use of small fluorescent lamps.

In fact, due to various reasons, a large proportion of consumers have rejected a small fluorescent lamp, these include flashing lights, color rendering, reliability and cost comparison, slow start and for the presence of mercury in environmental concerns. Although these problems have not been completely eliminated, these problems have been resolved, but in the eyes of many consumers, small fluorescent lamp is not wanted. In the short term, if the 100W incandescent lamps burn out, many of these consumers will switch to halogen incandescent lamps.

This raises the question of whether LED will be able to enter this gap and become a viable option for consumers. So far, there are no commercially available LED lamps to replace the ubiquitous 100W A19 incandescent lamp. The reason is that it has not been able to carry out physical passive cooling of the LED on the A19 factor of the output 1500lm (100W typical output of the lighting tube).

Since the white LED is a very efficient light source, about 1/3 of the input power can be converted to light, the remaining 2/3 power is converted into heat in the LED. Therefore, in 100lm/W, that is, about 100W power must be consumed continuously and quickly. If the heat is not removed, the LED lamp will heat up to a maximum operating temperature of 120 degrees centigrade.

This problem may eventually be resolved by the luminous efficiency of LED. Last year, the best cooling white LED achieved 100lm/W lighting efficiency; this year, a variety of white LED achieved 120 ~ 130lm/W range of lighting efficiency. This trend will not decay in the foreseeable future.

With the improvement of LED conversion efficiency, the improvement of thermal management is about the square of efficiency. Because the total power supply to the LED is reduced, and the amount of heat generated by the input power is reduced accordingly.

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