Many news events related to light emitting diodes (LEDs) appeared in March 2013. This is not accidental. In fact, it originated from the accumulation of many years of joint efforts in the industry and the breakthrough of many collaborative technologies, which led to the gradually acceptance of LED products in the market. .
The first news came from Cree, a well-known manufacturer of LED lighting and semiconductor products. They launched a subversion of the traditional LED bulb series, and believe that the retail price of this series will increase the acceptance of their customers' products. The company claims that the new Cree bulb series has a design life of 25,000 hours and a retail price of $ 12.97. It can be used to replace 60-watt (W) warm-light bulbs, which consumes 84% ​​less electricity than traditional incandescent lamps. In addition, more important for consumers, Cree also claimed that if you replace the five most frequently used incandescent bulbs in the home with Cree's LED bulbs, consumers can save up to US $ 61 per year (equivalent to about NTD 1, 780 yuan).
Not only that, Cree has further expanded its marketing channels, making the Home Depot chain an exclusive supply channel for such LED bulbs. This will ensure that the general public can purchase these LED bulbs close to home and be able to Get sufficient supply.
The second news is the hanging block of the famous San Francisco Bay Bridge. In the past 18 months, the lighting design company hung 25,000 from the top of the tower and the suspension cable to the bridge deck LED lights. The project is promoted by a company called Bay Lights. The company created a constantly changing and alternate algorithm to make LED lighting full of vitality. The company controls each lamp individually, so that the lighting pattern it produces is a 2-year project The period will be unique. The lighting system was developed by Color KineTIcs, a subsidiary of Philips. Its design power consumption is 85% less than traditional (non-LED type) solutions. The dedicated LED provided by Philips Color KineTIcs for this project is an eW Flex SLX product with a correlated color temperature of 4,200K.
The above two events demonstrate the technological advancement in the field of LED lighting output (measured in lumens per watt (lm / W)), as well as the commerciality of the annual energy savings due to the long installation life of LED bulbs.
LED bulbs have multiple advantages to gradually replace CFL / incandescent bulbs
There is no doubt that in the past 10 years, LED technology has made great progress, its brightness is higher, the efficiency is getting better, the use time is longer, and the cost is also continuously reduced, these are derived from heat dissipation, packaging and process progress. Unlike incandescent bulbs, LEDs have no filament, will not burn out, and emit cooler light.
High-power, high-brightness (HB) LED output light has surpassed the key milestone of 100lm / W, and some manufacturers have announced that they can produce output light greater than 230lm / W in the laboratory. Another advantage is the long service life of LEDs. The service life of white LED bulbs is at least 50,000 hours. However, the service life of incandescent lamps is about 1,000-2,000 hours.
The main reason for the rapid growth of the LED lighting market is that the power consumption of LED lighting is greatly reduced compared to traditional lighting. Compared with incandescent lighting, LED lighting can provide the same brightness (in lumens) with less than 20% of electricity consumption. As shown in Table 1, LED lighting has many advantages, but also has some disadvantages. The advantages of LED lighting include that the service life is several levels higher than incandescent lamps, which greatly reduces the cost of replacing bulbs. LED bulbs can be dimmed using the old Triode for AlternaTIng Current (TRIAC) dimmer, which is also a great advantage of LED bulbs, especially in the replacement bulb application.
Not only that, LED lights can be turned on instantly, unlike energy-saving fluorescent lamps (CFL) that require warm-up time, and LED lamps are not sensitive to power cycles, which is also different from energy-saving fluorescent lamps. The most important thing is that the LED lighting device does not contain any harmful materials, so there is no need to deal with or dispose of these harmful substances, and energy-saving fluorescent lamps use harmful mercury gas to work. Finally, LED bulbs can be packaged in very small form factors, but other bulbs cannot.
The above factors create advantages for LED bulbs to be used in a variety of commercial applications, such as ceiling lighting in factories, outdoor architectural lighting in bridges and buildings, and lighting applications in stadiums and other large-scale event venues.
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