They provide energy savings by reducing cooling loads by 20 percent and artificial lighting costs by 60 percent.

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In the United States, artificial lighting accounts for roughly 40% of the energy consumed annually by commercial buildings.

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When the full explanation for the modern epidemic of obesity has emerged, it is unlikely that the spread of artificial lighting will be the whole of it.

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Perhaps never before have so many spent so much time and effort debating how we use artificial lighting, and the role of that lighting plays in our lives.

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Even at night images were quite crisp with decent color, though there is some noise in the shadows, and the same goes for shots indoors under artificial lighting.

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One episode followed Royal Commission photographer Iain Wright as he works at night with artificial lighting to try to recover any fragments of the eroded inscription on the pillar.

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Bedrosian and her colleagues say that, among humans, exposure to artificial lighting at night has surged over the past 50 years, a trend that happens to coincide with large increases in depression prevalence.

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As many still photographers have found with the newer generation of digital cameras, artificial lighting is becoming less and less necessary as the devices are able to make use of more and more of the available light.

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