LED lighting Outlook: optical efficiency is getting higher and lower prices

LED lighting use white LED luminous efficiency is very obvious, the recent 1 ~ 2 years of progress is particularly significant. Although the value of more than 100lm/W, but in terms of LED lighting appliances are still beyond the fluorescent lamp. Because of the use of white LED lighting assembly, a power supply circuit of the power conversion loss, temperature and input current caused by the decrease of luminous efficiency in appliances, optical loss under the influence of the efficiency of lighting the overall (comprehensive efficiency) about the luminous efficiency of white LED from 50 to 70%, even using the latest white LED can only reach about 80%. Luminous efficiency will continue to improve in the future, the overall efficiency of the fluorescent lamp beyond the LED lighting appliances will be 2010 to 2015 years, at that time, LED will really become efficient No.1 lighting.

LED lighting apparatus released in June 2009 the unit brightness suggested retail price of 20 yen, about /lm, about lighting device using fluorescent lamp 4 times, the price gap is large, but after 2015, the price will be reduced to the level slightly higher than the fluorescent lamp, the comprehensive efficiency will reach 120 ~ 130lm/W, significantly exceeded the fluorescent lamp. By then, consumers will increase the willingness to use LED lighting. But even so, the price of fluorescent lighting appliances is still lower than LED lighting appliances, therefore, fluorescent devices will not disappear from the market.

Toshiba lighting technology in 2006 released LED bulbs, LED bulbs overall luminous efficiency of only 18lm/W, only to replace decorative bulbs. After that, the efficiency of LED lighting gradually increased to 45lm/W in 2007, 68lm/W in 2008, already can be used as lighting with light bulbs, 82lm/W in 2009 and 93lm/W in October is to replace the ordinary lamp bulb for lighting level.

2008, Sharp Co to enter the LED market with low price strategy. In June 2009, the company released a new LED bulb, the market price of about 4000 yen, only half of similar products, launched immediately after the market set off a strong shock wave. Sharp Co's low price products forced Toshiba lighting technology in July 2009 launched the equivalent of 60W incandescent light bulb LED, its manufacturers suggested retail price of about 5000 yen, the market price of about $4000. Compared with similar products launched 4 months ago, Toshiba's price has dropped by more than $50% (see chart 1 and table 1).

Figure 1: LED lamp price comparison

Table 1: LED lamps prices fell significantly

In the LED lighting market, other Japanese companies followed. July 2009, Ecorica slashed the company in the same year in April launched the price of LED bulbs, down from the original 7200 yen to 3780 yen, IRISOHYAMA also launched a price of 3980 yen products. NEC lighting in August 2009 released a LED bulb, the press release said its price has a strong market competitiveness. In late October, Panasonic Corp also launched 10 competing products with the same price of the EVERLEDS series LED bulb products.