LED Taiwan

As we all know that LED technology shows great promise in lighting the way for Tech to a more economic and environmentally-friendly direction.

Facilities faculty has completed several lighting renovations already on campus, including converting all the lighting in the Tennenbaum Auditorium to LED lamps. This project alone reduced electricity consumption by 39.2%, and light per square foot more than doubled. They also installed LED can lights on the second floor of the Price Gilbert Library.

“We are currently working on several projects in the IBB building to convert high ceiling fixtures to LED and will eventually expand this to other buildings. The architecture building is next on the list,” said Sanford Fong, Facilities department Electrical Engineer I.

Heat, output and energy usage are the greatest factors in LEDs’ benefits. Since the lights do not rely on a filament, they don’t burn out as quickly and less of the energy emitted is heat (very beneficial for stage work, which is often under extremely hot rows of lights). Since less energy is emitted as heat, it does not require as much energy to produce the light, saving money.

Read the rest of this entry »

An updated study has been published by Limited, developer of thin-form supercapacitors that compare flash solutions for camera phones – xenon, standard LEDs powered by a battery, and high-current LEDs powered by a supercapacitor using the company’s BriteFlash(TM) power architecture. The study tested each solution’s ability to deliver the light energy needed to take digital-still-camera-quality pictures in low-light conditions, and also compared shutter requirements, ease of design-in, safety and size.

The original report from October 2006 compared light power and energy using 1.3 to 3.2-megapixel camera phones. The new report includes data from 5-megapixel camera phones released in the last year, and also considers advancements in camera sensors, xenon flash units, high-power white LEDs (WLEDS) and LED flash drivers.

Tests again showed that the LED BriteFlash approach delivers more light energy than most xenon flashes in a thin form factor suitable for slim camera phones and digital cameras.

Read the rest of this entry »

As we all know that the future of energy efficient lighting is LED. Not only are LED’s environmentally friendly, the light represents a true white light. A recent press release printed in the Village News on ways to cut energy expenditures missed the mark completely.

Although it is true that CFL bulbs do save energy, they also contain mercury, which is a hazardous material, and these bulbs cannot be disposed of easily. If the bulb is broken, there is a huge problem because the mercury is disbursed throughout the area.

The future in lighting is the use of LED (light emitting diodes) lamps.

First, the operational life of current white LED lamps approaches 100,000 hours. The key strength of LED lighting is reduced power consumption approaching 80 percent efficiency, compared to an incandescent lamp, which operates at about 20 percent efficiency. LED lamps are now available on the Internet and at Wal-Mart.

Read the rest of this entry »

There are millions of general service fluorescent tubes in the market place today, until recently these were considered the most energy efficient lighting solution available. The downside to this for of lighting is that each tube contains a small amount of mercury vapour, a toxic heavy metal. This can provide not just a health risk when the tubes are broken, but can also accumulate in landfills before entering the water table or causing further pollution.

Fluorescent lamps use electricity to excite mercury vapour inside the glass tube and always require a ballast to regulate the flow of power through the lamp. A starter is in the circuit to heat the contact ends of the tube that ionizes the mercury vapour creating UV light. The inside of the tube is coated with a phosphor material that glows when exposed to the UV light produced by the mercury inside the fluorescent tube.

Recent developments in SMD (Surface Mount Diode) LED technology have now meant that LED based fluorescent tubes are now a reality. LEDs are a more efficient form of lighting product consisting of small chips of conductive material that release light when a current is applied to them. They contain no filaments and can produce up to 25 times more light per watt than conventional light bulbs.

Read the rest of this entry »

Even better, the industry offers a superior product with an earth-first attitude. The LED light bulb, which use current passed through a diode to provide light, is in the midst of serious growth. Databeans, a leader in electronics market research, estimates that the global LED market will grow to $5.3 billion by the need of this year. An impressive figure by itself, this number is all the more striking when taken into account that very few consumers are using LEDs, as they are currently far more common in commercial applications.

The rate of growth is remarkable, but the fact that the size of the energy efficient light bulb industry is growing should come as a surprise to no one. These bulbs provide significant financial savings by reducing energy costs up to 75% compared to incandescent bulbs. Maintenance costs are also lowered due to a far longer life (up to 50 times longer than incandescent lamps. This also means less time spend climbing ladders, recycling bulbs, and dealing with outages. Other benefits of LED light bulbs include a much cooler operating temperature and more flexible color options.

Read the rest of this entry »

Outdoor Grayscale LED Signs & Displays Provide Increased Graphics Capabilities

Outdoor Grayscale Text/Video LED Signs are similar to Monochrome LED Signs in that they only use a single color of LED (usually red or amber) to create text and or graphic images on the LED Sign.

The difference is that the Grayscale LED Sign will allow multiple shades of the single color LED whereas Monochrome LED Signs will only display one shade of a single color.

The Grayscale LED Sign is similar to a black and white television. It will show video and graphics but only in different shades of a single color.

Read the rest of this entry »

Not only can they extend the useful life of your LEDs, drivers also aid in dimming and color changing

Light emitting diodes (LEDs) are low-voltage light sources that require a constant DC voltage or current to operate optimally. Because they operate on a low-voltage DC power supply, they easily adapt to different power supplies, have longer standby power, and are safer. Individual LEDs that are used for illumination require 2V to 4V of direct current (DC) power and several hundred milliamps of current. As LEDs are connected in series in an array, higher voltage is required.

In addition, the light source must be protected from line-voltage fluctuations during operation. Changes in voltage can produce a disproportionate change in current, which in turn can cause light output to vary, as LED light output is proportionate to current and is rated for a current range. If current exceeds the manufacturer recommendations, the LEDs can become brighter, but the increased heat can degrade their light output at a faster rate and shorten useful life. One definition of useful life for LEDs is the point at which light output declines by 30%.

After an electrical fire destroyed the face of a Carl’s Jr. fast-food franchise sign, the neon signage was replaced with new LED signage powered by LED drivers. Input watts dropped from 200W to 38W with the LED system, producing a payback in less than two years. (Photo courtesy of Advance Transformer Co.)

Read the rest of this entry »

LED Basics and Background

A light-emitting diode (LED) is a semiconductor chip that emits light when conducting current. LED’s are very versatile due to their ability to emit nearly all spectrums of light. This has led to their nearly universal adoption as a light source for a wide range of applications from: status indicator lights, to traffic signals, to today’s advanced direct replacement LED light sources.

Modern LED’s are as versatile as they are diverse in their forms

Although, LED’s that produce a practical spectrum of visible light have been under constant development since the 1960’s, only recently have LED’s that can produce acceptable levels of illumination – for a primary lighting source in a home or business – seen mass production. The pace of innovation in the field of LED illumination, also referred to as Solid State Lighting (SSL), is currently progressing at an amazing pace. The latest bulbs available from LEDTW.com did not even exist one year ago!

Benefits of LED light sources

Read the rest of this entry »

In 2008 Lemnis Lighting launched a revolution in public lighting: the het Lumis-LED luminaire. This LED lighting solution for the public space saves 30 to 70 percent energy in relation to traditional lighting. With the Lumis-LED, public authorities can make a giant step in reducing energy use, CO2 emissions and light pollution. Street light by Lemnis Lighting guarantees excellent vision, is remarkably energy efficient, has a long lifespan, requires little maintenance and is available for immediate placement. Moreover, the luminaires are dimmable, for even larger energy savings.

The Lumis-LED is available in three light colour combinations (Green, Ecowhite and Moonlight) and in a variety of light output powers. The Lumis-LED is a retrofit luminaire with a 20 year lifespan that fits any mast, if necessary through the use of an adaptor. The Lumis-LED is applicable for residential areas, parks rural areas, tunnels, parking spaces, cycle paths, and naturally for public roads and thoroughfares. More than 150 projects have already been realised in several different countries.
Lumis-LED, the sustainable luminaire for the public space

Read the rest of this entry »

LED bulbs – a revolution in indoor lighting

The LED bulbs is a smart buy. It offers a direct replacement of existing light bulbs and saves energy without concessions to lighting quality and lighting atmosphere. The lamp uses up to 90 percent less energy than an incandescent bulb and is more energy-efficient still than a CFL lamp while giving off a warm white light and is, in case of the Pharox 300, dimmable. Moreover the LED bulbs has a much longer lifetime. Users typically earn back their lamp within a year, and then continue to save money for up to 25 years! That’s not just a good deal for consumers, but also for our planet. LEDtw.com Lighting develops the Pharox line of LED lamps from the philosophy that sustainable lighting needs to be an improvement over existing Technologies that does not require a sacrifice on the user’s end. The LED bulbs proves that it’s possible: a light bulb that lasts longer, does not contain mercury and that fits a standard fitting. Using the LED bulbs, consumers and businesses can start contributing to a more sustainable world, today.
Why LED lighting?

Read the rest of this entry »