
32 Incandescent Lamps
very good color rendering index, which have been designated as 100. The largest
percentage of radiation is in the infrared so around 90% of the electric energy is
lost in the form of heat. Regarding the 10% of visible emitted radiation, most of it
is in red, which gives the white color of the source a warm tone.
Incandescent lamps play a key role in indoor lighting, such as home lighting due
to the comfortable warm white light they emit, the variety of shapes they come
in, the good color rendering, and their simple operation. However, they are not an
economic solution since the efcacy is small (not exceeding 20 lm/W) a ...