Lumens vs. Watts


http://www.ftc.gov/bcp/edu/resource/flash/video-player_495x312.swf

What’s a Watt?

Watts measure the amount of power a bulb uses – not how bright it is. So, using watts to describe brightness is like using gallons of fuel to describe how fast a car can go.This practice wasn’t a problem as long as we continued to use the more than 100-year-old incandescent bulbs.

The problem: Traditional incandescent light bulbs waste 90% of their electricity to produce heat, and use only 10% to produce light. The solution: energy-efficient bulbs, which use fewer watts to give off the same amount of brightness.

As more consumers buy energy-efficient bulbs, labels on bulb packages are using a more accurate measurement of brightness: lumens.

Look for Lumens

Lumens measure the amount of light produced by a bulb. The more lumens in a light bulb, the brighter the light

The FTC’s conversion chart shows how lumen measurements match up to the old wattage amounts (see image on the right).

For example:

  • 40-watt incandescent bulb = 450 lumens
  • 60-watt incandescent bulb = 800 lumens
  • 100-watt incandescent bulb = 1600 lumens

More info at: solarserdar@gmail.com

CROATIAN CENTER of RENEWABLE ENERGY SOURCES (CCRES)

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About CROATIAN CENTER of RENEWABLE ENERGY SOURCES

CROATIAN CENTER of RENEWABLE ENERGY SOURCES (CCRES)• was founded in 1988 as the non-profit European Association for Renewable Energy that conducts its work independently of political parties, institutions, commercial enterprises and interest groups, • is dedicated to the cause of completely substituting for nuclear and fossil energy through renewable energy, • regards solar energy supply as essential to preserve the natural resources and a prerequisite for a sustainable economy,• acts to change conventional political priorities and common infrastructures in favor of renewable energy, from the local to the international level, • brings together expertise from the fields of politics, economy, science, and culture to promote the entry of solar energy, • provides the opportunity to play a part in the sociocultural movement for renewable energy by joining the association for everyone, • considers full renewable energy supply a momentous and visionary goal - the challenge of the century to humanity. CCRES Željko Serdar Head of association solarserdar@gmail.com
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