Street lights | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-04

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Street_light


00:00:44 1 History
00:00:53 1.1 Preindustrial era
00:03:46 1.2 Gas lamp lighting
00:07:25 1.2.1 iFarola fernandina/i
00:08:07 1.3 Arc lamps
00:10:06 1.4 Incandescent lighting
00:12:55 1.5 Later developments
00:14:55 2 Modern lights
00:18:17 3 Measurement
00:19:17 4 Advantages
00:20:29 5 Disadvantages
00:20:47 5.1 Health and safety
00:22:32 5.2 Light pollution
00:23:27 5.3 Energy consumption
00:24:27 6 Street light control systems
00:25:32 6.1 Accessories
00:26:26 6.2 Economics
00:26:56 6.3 Image-based street light control
00:27:37 7 Purpose
00:28:01 7.1 Beacon lights
00:29:07 7.2 Roadway lights
00:30:51 7.3 Cycle path lights
00:31:10 7.4 Footpath lights
00:31:19 8 Maintenance
00:32:36 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.