Lighting

The European Union has ruled to gradually banish all incandescent bulbs (which regards the production of new bulbs) with the following schedule:

  • from September 2009, the production of 100 W incandescent light bulbs  or more, and all the bulbs  with frosted or opal glass is prohibited;
  • from September 2010 the production of  75 W incandescent light bulbs is prohibited;
  • from September 2011 the production of  60 W incandescent light bulbs is prohibited;
  • from September 2012 the production of  incandescent light bulbs of all powers is prohibited.

Exception is made for incandescent light bulbs made for specific purposes  (e.g.  refrigerators, ovens, etc).
A 100 watt (W) incandescent light bulb produces the same amount of light as a 20W compact fluorescent bulb;  this means that the two bulbs emit a similar luminous flux (measured in lumens, lm).
The  lumen/watt ratio indicates the lighting efficiency of a light source. While 100W incandescent light bulbs are characterized by a modest lighting efficiency (14 lm/W), because about 80% of the electric energy is transformed into heat and only the remaining 20% into light,  20W CFLs have a much higher lighting efficiency (60 lm/W).
The more efficient operating mechanism leads to a decrease of up to 80% in the consumption of electric energy for an equal luminous flux.
Low consumption light bulbs cost slightly more, but their average life span is remarkably longer than the traditional light bulbs  (10,000 hours vs. 1,000  hours of the incandescent light bulb).
Replacing the incandescent light bulbs can be a great advantage, the higher cost for  purchasing the same is however recovered in a very short amount of time.
Other initiatives:

  • turn off the lights if they are no longer needed;
  • regularly clean the lighting equipment : the dust, greasy smoke and vapours of the kitchen can decrease the amount of emitted light up to 20%.

Special reports

From the Multimedia section

  • energy

    World population growth

    Look

    energy

    Energy and movement

    Look

    energy

    Sources of energy

    Look
  • energy

    Limits of resources

    Look

    energy

    Limits of growth

    Look

    energy

    Slavery

    Look
  • energy

    Human development

    Look

    energy

    Earth and energy

    Look

    energy

    Material cycles and energy flows

    Look
  • energy

    World population growth

    Look

    energy

    Energy and movement

    Look
  • energy

    Sources of energy

    Look

    energy

    Limits of resources

    Look
  • energy

    Limits of growth

    Look

    energy

    Slavery

    Look
  • energy

    World population growth

    Look
  • energy

    Energy and movement

    Look
  • energy

    Sources of energy

    Look

Facts

  • Where does energy come from?

    Every day the Earth receives enough solar energy to satisfy the global energy need...

    Electricity and electrons

    In all electric plants, excluding photovoltaic solar plants, mechanic energy is transformed into electric energy through the same basic procedure...

    Peat and peat-bogs

    The age of coal starts towards the mid 1600s, stimulated by the need for finding an alternative energy source to…

  • Geographical distribution of energy

    Every day the Earth receives enough solar energy to satisfy the global energy need. Unfortunately we cannot exploit all this…

    Orimulsion

    In order to improve supply security, and therefore the diversification of sources to produce electric energy...

    Cracking operations

    At the end of the fractional distillation, long hydrocarbon molecules can be transformed into lighter molecules by means of more…

  • Hydrogen from biomass

    Hydrogen is an energy carrier that allows to generate energy in an environmentally sustainable way...

    ITER fusion reactor

    The reactor that will be able to produce electronuclear energy without risk of explosion or radioactive waste...

    Phyto-depuration

    A very interesting project has been carried out by Lombardy region...

  • 2 March 2011

    Where does energy come from?

    Every day the Earth receives enough solar energy to satisfy the global energy need...

    Electricity and electrons

    In all electric plants, excluding photovoltaic solar plants, mechanic energy is transformed into electric energy through the same basic procedure...

  • Peat and peat-bogs

    The age of coal starts towards the mid 1600s, stimulated by the need for finding an alternative energy source to…

    Geographical distribution of energy

    Every day the Earth receives enough solar energy to satisfy the global energy need. Unfortunately we cannot exploit all this…

  • Orimulsion

    In order to improve supply security, and therefore the diversification of sources to produce electric energy...

    Cracking operations

    At the end of the fractional distillation, long hydrocarbon molecules can be transformed into lighter molecules by means of more…

  • Where does energy come from?

    Every day the Earth receives enough solar energy to satisfy the global energy need...

  • Electricity and electrons

    In all electric plants, excluding photovoltaic solar plants, mechanic energy is transformed into electric energy through the same basic procedure...

  • Peat and peat-bogs

    The age of coal starts towards the mid 1600s, stimulated by the need for finding an alternative energy source to…