The strategy in coping with the rising power cost (3):How LED light bulbs can replace compact fluorescent lamp?

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Although the advantage of using LED light bulbs is “Saving Energy”; its current market price and energy-saving effect still cannot compete with the compact fluorescent lamp’s. Yet, if the luminous efficiency of LED light bulbs can reach 80 lumens and its price can decrease by 40%, the cost of LED light bulb can catch up with that of the compact fluorescent lamp. In terms of the current production process of LED manufacturers, the demand of LED light bulbs will probably dramatically increase by 2010.

Also, for the LED light bulbs to replace the compact fluorescent lamp, and become the main household lighting source, aside from its brightness and cost, the “color temperature” will be the critical point to consider about. In terms of the household light bulbs, since the color temperatures of them range from 2500 to 3500K, it brings about a warm interior-feeling. However, because of the limitation of the phosphor, the luminous efficacy of warm white LED is 80% of cold white LED, where the color temperature is around 6,000k. Therefore, if LEDs are set to become the household lighting source, the luminous efficiency of the warm white LED should be increased  to 100 (LM/W).

According to the projections by DOE (Department of Energy) in relation to the solid-state lighting market from year 2009 to 2014, the luminous efficiency of cold white LED will reach 140 to 150 (Lm/W) by 2010, and warm white LED will be 110 (Lm/W). When the luminous efficiency of LEDs has been improved to more than 100 (Lm/W), the luminous efficiency of LED light bulbs will be improved to 80 (Lm/W) as well. Thus, it will enjoy a great cost advantage which is better than compact fluorescent lamps. Besides, since the LED manufacturers of Taiwan and Japan have both respectively increased their capacities, the price of LEDs will probably go down in 2009 which paves the way to consumer acceptance and also alleviates the prices of LED light bulbs in the end market.

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