Street light | 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
00:03:43 1.2 Gas lamp lighting
00:07:21 1.2.1 iFarola fernandina/i
00:08:01 1.3 Arc lamps
00:10:00 1.4 Incandescent lighting
00:12:46 1.5 Later developments
00:14:44 2 Modern lights
00:18:04 3 Measurement
00:19:02 4 Advantages
00:20:15 5 Disadvantages
00:20:33 5.1 Health and safety
00:22:18 5.2 Light pollution
00:23:13 5.3 Energy consumption
00:24:13 6 Street light control systems
00:25:17 6.1 Accessories
00:26:11 6.2 Economics
00:26:41 6.3 Image-based street light control
00:27:22 7 Purpose
00:27:46 7.1 Beacon lights
00:28:50 7.2 Roadway lights
00:30:35 7.3 Cycle path lights
00:30:53 7.4 Footpath lights
00:31:02 8 Maintenance
00:32:18 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.