Streetlights | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-06

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Street_light


00:00:40 1 History
00:00:48 1.1 Preindustrial era
00:03:22 1.2 Gas lamp lighting
00:06:37 1.2.1 iFarola fernandina/i
00:07:14 1.3 Arc lamps
00:09:00 1.4 Incandescent lighting
00:11:30 1.5 Later developments
00:13:18 2 Modern lights
00:16:18 3 Measurement
00:17:12 4 Advantages
00:18:17 5 Disadvantages
00:18:34 5.1 Health and safety
00:20:08 5.2 Light pollution
00:20:57 5.3 Energy consumption
00:21:51 6 Street light control systems
00:22:49 6.1 Accessories
00:23:38 6.2 Economics
00:24:05 6.3 Image-based street light control
00:24:43 7 Purpose
00:25:05 7.1 Beacon lights
00:26:04 7.2 Roadway lights
00:27:38 7.3 Cycle path lights
00:27:55 7.4 Footpath lights
00:28:04 8 Maintenance
00:29:13 9 Main manufacturers



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SUMMARY
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A street light, light pole, lamppost, street lamp, light standard or lamp standard is a raised source of light on the edge of a road or path. When urban electric power distribution became ubiquitous in developed countries in the 20th century, lights for urban streets followed, or sometimes led.
Many lamps have light-sensitive photocells that activate automatically when light is or is not needed: dusk, dawn, or the onset of dark weather. This function in older lighting systems could have been performed with the aid of a solar dial. Many street light systems are being connected underground instead of wiring from one utility post to another.