Lighting Basics: Light Output & Distribution – Lumens, Lux & Foot-candles
News from Greener Ideal:

Photo: Darla دارلا Hueske

The three primary factors to take into consideration when choosing an energy-efficient light fixture are: how much electricity does it consume, how and where is light delivered, and how long it lasts. In this blog post I will be addressing the first two: consumption and delivery via Lumens, Lux and Foot Candles. Stay tuned for the final factor in an upcoming blog post about Lifespans.

If you are an engineer, most likely these are basic concepts for you. However, if you are a building manager tasked with shopping for anything from energy-efficient high bay fixtures for your warehouse, to radius wraps for stairwells and parking garages – you need to understand the basics to make the best choices.

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Lights out for incandescent bulbs, with some exceptions
News from Dailysunnews:

The good news is that the ban on light bulbs that took effect at the beginning of this year won’t affect Easy-Bake Ovens. Nor are incandescent bulbs truly a thing of the past.

As of the beginning of this year, the manufacture of 40- and 60-watt incandescent light bulbs is banned in the United States. The manufacture of higher watt bulbs had been banned in previous years, all thanks to the Energy Independence and Security Act of 2007 signed into law by President George W. Bush.

The law put the United States in line with most of the world in phasing out incandescent bulbs for most uses. However, there are still a number of loopholes for people who really love their old fashioned light bulbs.

The incandescent bulb was invented as early as 1803 and finally patented by Thomas Edison in 1880. Despite some flaws, it’s been the most commonly used type of light source for more than 125 years.

The bulb consis…………… continues on Dailysunnews

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