22 Oct 2008
Guiding Light(HKTDC Electronic Components & Parts, Vol 01,2009)
One example is a super energy-saving 5W LED bulb, model M19E27, from Ningbo Sunpu Opto Semiconductor Co Ltd.
"This model consumes 60% less power than conventional incandescent bulbs and has a lifespan of about 20,000 hours compared with 3,000 hours for incandescent counterparts," says Director Scott Tang.
Offering a wide choice of emitted light - including red, green, blue, yellow, pure white and warm white - the bulb uses high-brightness LED technology and gives off different levels of luminous intensity for indoor applications.
"Our LED bulbs are priced from US$10-20 each FOB Hong Kong, depending on the model. They're especially popular in Japan and Europe, where businesses such as supermarkets opt to use them because of their energy efficiency and durability," Mr Tang says.
Emitting an equally wide light spectrum is the company's 12W LED flux strip model 2.254X11.
"This model is a favourite with restaurants that require cove lighting decor, being 60% more energy-efficient than fluorescent lights and lasting about 40,000 hours," Mr Tang notes, adding that the item is priced at about US$10 per metre FOB Hong Kong.
Also capable of high luminosity, low power consumption and longevity are offerings from Wah Wang Holdings (HK) Co Ltd, such as the firm's series of through-hole LEDs that are widely used in advertising panels and torches.
"Besides, they can also be used in solar lamps, toys and other premium lighting products such as small objects that require decorative lights," says Winson Au, Assistant to the General Manager.
The LEDs come in different sizes, including 10mm (such as model WW 10A 3SWQ4-N2), 5mm (such as model WW 05A 3SWQ4-N) and 3mm (such as model WW 03A 3SWQ4-N2).
The company also offers a series of high-power LEDs, available in 0.5W, 1W, 3W or 6W, which are often used outdoors in torches, lighting systems and street lamps, and indoors in decorative or emergency lighting.
"Our 1W high-power LEDs, for example, provide a light intensity that is 20 times that of normal LEDs, and have a lifespan of more than 50,000 hours," Mr Au claims, adding that the series includes a 3W RGB LED (model WW-E203FH1-B8), a 1W star power LED with heat sink (model WW-E101WL1-W4), and a 6W star power LED (model WW- E306WH0-W2).
Also on offer is Wah Wang's series of top LEDs, including 35x28mm model WW-WNA30TS-Q.
"This version is widely used in mobile phones and other digital devices that require backlighting solutions because of its high light intensity, superb heat dissipation ability and surface-mounted interface," explains Mr Au.
Elsewhere, to dress up buildings with dazzling light effects, LED blocks made by Sui Rich Esat HK Co Ltd provide the perfect solution.
"Used for accent lighting and perimeter lighting, these LED blocks comprise small direct-view fixtures that, when put together in large numbers, create mesmerising lighting effects on buildings with changing colours in rich, saturated tones," says Sales Engineer Daniel Li.
Each light fixture is fully enclosed in a rugged die-cast aluminium housing and is given an IP66 rating, which means it can be used under wet conditions.
The LED blocks offer the RGB colour range and three types of control: computer-based video control, DMX512 control and stand-alone pre-programmed control.
"We can provide clients with solutions and installation services to meet their specific requirements. Our engineers and technicians have installed the blocks on buildings in such cities as Shanghai, Shenzhen and Xiamen," Mr Li notes.
Also increasingly popular are the company's LED curtain screens, which have resolutions similar to TVs and which are ideal for applications such as large outdoor advertising panels.
"Our main markets for this product are Europe, the US and Asia," says Mr Li.
For indoor decorations, the company's LED SMD festoon model 72819295916 can be used in display cabinets or curved decorations to provide a soft-lit ambience. "The 0.72W model provides brightness equivalent to a conventional 5W bulb but consumes 80% less power," Mr Li says.
With a diameter of 10.5mm and a length of 41mm, the festoon has a diffused light angle of 120° and offers a colour choice of cool white, warm white, blue, green, red and yellow.
Clearly, bright ideas for optoelectronic components abound in China, where LED manufacturers can be buyers' guiding lights.