Publication details

What is the real efficiency of bulbs?



Year of publication 2012
Type Article in Periodical
Magazine / Source Physics Education
MU Faculty or unit

Faculty of Science

Field Non-nuclear energy, energy consumption and use
Keywords efficiency; efficiency of bulbs; bulb; fluorescent lamp; lighting; heating; air conditioning; period; sun; elevation angle; price; energy consumption; savings; interior; buildings; tropical; moderate; Stockholm; temperature; DST; duration of lighting
Description Bulbs give light and heat. As we use them for a long time especially in winter, a large part of the heat produced by bulbs lowers the power consumption of the heating system. In this paper the problem of the real efficiency of a bulb is solved when both the lighting and heating effects of illumination of the interior of buildings are taken into account. It is analysed from the viewpoints of the energy consumed and the price of that energy. The real efficiency of bulbs and the savings obtained by replacing them with fluorescent lamps are calculated for various locations.

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