Industry is another big consumer of coal and electricity. Energy is used in the industrial sector mainly for lighting, heating, air conditioning and ventilating system as well as running motors and machines.
It is a matter of serious concern that Indian industries are consuming power for similar jobs as compared to industries in several foreign countries. In other words our industries are less fuel –efficient. It is estimated that about ten to fifteen percent industrial energy can be saved from fuel efficient medium of light. This can be done without much use of fluorescent lamps or high pressure mercury vapor lamps HPMV or high pressure sodium vapor lamps HPSV. These offer better optical control.
All ordinary (tungsten) 200 W lamps can be replaced by 80 W HPMV for the same level of illumination. It is better to use MLL (combination of mercury vapor lamp and an incandescent filament lamp in glass envelop). Light of 160 W MLL lamps is same as that of 200 W incandescent lamps and its life is times more.
Fluorescent, HPMV and HPSV lamps are more efficient.
Similarly, incandescent lamps be replaced with inflorescent tubes to save energy.
HPSV are most street light and yard lighting purposes because they give very high light. One can save energy of 150 W per cent point by using 250 W HPSV in place of 400 W HPMV lamp.
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