LIGHTING AND CONSUMPTION ELECTRICAL
Lighting is responsible for about 8, 9% of total primary energy consumption in the world, and is due to the issuance of approximately 1.9 billion tons of CO2 into the atmosphere each year .
Electricity demand for lighting is growing annually by about 2.1%, and consumption is highest in the United States and Europe. The residential sector and the business are responsible for approximately 75% of total electricity consumption for lighting, followed by industry with about 18%.
average, the residential sector accounts for the lowest efficiency in lighting, estimated around 20 lumens per watt (lm / W) in 2005. The figure is well below the efficiency of other sectors: 50 lm / W for commercial, 80 lm / W for the industry. This is due to lack of information of "small" consumers generally opt for the purchase of low cost and highly inefficient, as the traditional incandescent and halogen lamps.
The first with only 11-12 lm / W, wasting more than 90% of the energy dissipated as heat as halogen lamps can reach 20 lm / W, but they are still very inefficient when compared with the Modern fluorescent lamps Compact (CFL) have efficiency around 60 / 70 lm / W.
At constant illumination the LFC lowers power consumption and greenhouse gas emissions by 80% compared to incandescent.
Text taken from "Special bulbs green" - Ferrari Comoli
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