Tag Archives: leds

OSRAM-OS virtual tradeshow from LightFair May 12th – 14th 2010

 OSRAM Opto Semiconductors features LIGHTFAIR 2010 through its new virtual web portal

OSRAM Opto Semiconductors features LIGHTFAIR 2010 through its new virtual web portal

As you know, Mr Green and I are great fans of LED lighting. We’ve installed LEDs for the downstairs of our home and they are running from a small solar panel.

I was excited to hear about OSRAM Opto-Semiconductors (OSRAM-OS) latest venture. The company make LED’s for a variety of uses and they are exhibiting at LightFair 2010; a lighting trade show, which takes place May 12 – 14 in Las Vegas. Continue reading

Quanta LEDs with a twist of decor

Quanta 9 LED in a decor shade

Quanta 9 LED in a decor shade

In our review about the Quanta 18 LED from Eternaleds, I talked about a little trick to improve the light distribution and dispersion. LEDs are not especially good at being a general room light, as they tend to be directional and produce harsh shadows. The Quanta range from Eternaleds are designed to be  floodlight replacements, that is, they are partially directional to produce a soft cone of light in one area.

My modification was to fit a simple paper lampshade around the LED that assists in difusing the light and making it suitable for a general room light. Continue reading

LED review: best 100 watt alternative from EternaLEDS

quanta-18 by EternaledsThe Quanta PAR38 LED from Eternaleds runs off just 18 watts of mains electricity, and outputs light equivalent to a 100 watt incandescent light bulb. The quanta PAR38 is a simple screw in retrofit unit that will easily replace your conventional E27 floodlight or spotlight bulbs. When you do so, you can sit back and forget replacing it again for the next 35,000 hours or about 12 years normal use*. All the while you run this LED, you can also be assured that you are getting the maximum light output for the minimum electrical usage. The Quanta PAR38 is definitely one of the best designs in today’s current LED lighting products. Continue reading

LED colour quality, CRI and binning.

What is white light?

What is white light?

One main criticism of LEDs used for room and space lighting is that the colour or hue of the light appears cold and harsh. Some LEDs appear as tiny, brilliant lights that are too bright to look at, but seem to give very little illumination. There is a quantitative measure of the ability of a light source to reproduce the colors of various objects faithfully in comparison with an ideal or natural light source called Colour rendering index, or  CRI. We are used to a much warmer light from conventional incandescent lights because filament bulbs have a broader spectrum of light that is biased towards the warm red frequency. Continue reading

What’s the point of LED lighting?

LED frame and components

LED frame and components

Light Emitting diodes (LEDs) are not a new invention. The LED was first invented in Russia in the 1920s, and introduced in America as a practical electronic component in 1962. Oleg Vladimirovich Losev was a radio technician who noticed that diodes used in radio receivers emitted light when current was passed through them. In 1927, he published details in a Russian journal of the first ever LED. Over the years, LEDs have been developed for a number of applications but since 2006 Nakamura developed a phosphor coating that enabled a high power white LEDs that had real practical lighting possibilities.  There are other methods for producing light including the RGB LED. This combines the theree primary colours to create any wavelength of light.

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LED lighting can be off the grid and FREE

Solar power for homes

Solar power for homes. Free lighting anyone?

After my article yesterday on LEDs a new generation of lighting I had a nice email from Jeff at EternaLeds.com Jeff Detailed how his company had progressed through similar issues of low powered LEDs with poor quality of light. They are now providing an excellent range of LED lights for the US market (110-120 volt) that provide genuine retrofit replacements for incandescent and CFL units. Continue reading