Session: Energy Efficiency Programs around the World
Track N | Energy Management around the Globe
Energy Sustainable Communes Program
Erwin Plett, Ph.D., C.E.M.
Alfa Lux SpA
When homo erectus needed illumination, 1.6 million years ago, they lit a fire or a torch, obtaining illumination with lighting efficacy of 0.05lm/W. Before
15.000 BC homo sapiens invented oil lamps for illumination, obtaining 0.1lm/W. T.A. Edison’s brilliant light bulb, obtained 15lm/W during 135 years,
“brilliant idea” that died last year, when Incandescent Bulbs finally were banned worldwide for being a huge waste of energy. Fluorescent Lamps (tubes
and CFL) brought 70lm/W using mercury, which compares with clean modern Light Emitting Diodes (LED) reaching astonishing 300lm/W.
Since 1880, if you needed light, you bought a simple bulb, screw it on, and it worked perfectly on and off. Suddenly scientist declare “luminaire is
a machine to convert electricity into visible radiation for humans”, and state that “they must be efficient to be economic”. Today’s illumination got
so much complicated than in those good old times, because advances in human physiology, as recent as 2007, allowed scientific explanation of the huge
influence of illumination on humans: visual effects, non-visual (biological) effects and emotional effects. Today we have to differentiate day light
photopic vision (red, green and blue colors by cones, with highest sensitivity in greenish-yellow), scotopic vision (night vision by rods, with highest
sensitivity in greenish-blue), and melanopic vision, light brightness and light temperature sensed by the newcomer in human eye physiology “ipRG Cells”
with highest sensitivity in violet-blue.
But today’s “lighting revolution” not only brings large hard-saving in energy with LED technology and ecology (avoiding mercury of fluorescent lamps,
burning less fossil fuels, with less ambient night glare), but we are seeing interesting soft-savings in improving
wellbeing for people, and hence higher productivity of employees, higher academic scores in students. The soft-savings yet to come, applying the principles
pursued by the Human Centric Lighting Society will be a blessing for all humans.
As in every revolution, these fundamental changes are hard to understand, because it takes engineers and architects out of their comfort zone, treating
lighting for so long as simple commodity. Now is the time for practitioners to take this amazing new technology and physiology knowledge into practical
There are marvelous practical modern lighting examples that are shown in this presentation, which are inspiring for everybody, starting from architects
to designed illumination for human purposes, followed by engineers designing smart automated lighting systems, physicians using light instead of pharmaceuticals
for improving health, and general managers to monitor online the astonishing ecological, human well-being, and economical results of this lighting
Track: N Energy Management around the Globe | Session: Energy Efficiency Programs around the World
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