Question

In context, which choice best combines the

Answer 1

Aside from lowering worker productivity, artificial light sources are also costly, typically constituting anywhere from 25 to 50 per cent of a building’s energy use.

What are Artificial light sources?

In the late 19th and early 20th centuries, electric energy sources were used to generate artificial lighting. The goal of technological development for artificial lighting is to create light that will approximate natural sunshine (sunlight). The frequency range of an artificial light source and the intensity of illumination, expressed in lumens, are the two metrics used to measure artificial light. According to its progressive generation and the technology that made it possible, artificial light can be divided into three main sources.

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