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

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Lighthouse


00:00:38 1 History
00:00:47 1.1 Ancient lighthouses
00:02:04 1.2 Modern construction
00:05:58 1.3 Lighting improvements
00:08:30 1.4 Optical systems
00:10:33 1.5 Recent
00:11:50 1.6 Famous lighthouse builders
00:13:22 2 Lighthouse technology
00:13:32 2.1 Power
00:15:09 2.2 Lens
00:18:32 2.3 Laser light
00:19:02 2.4 Light characteristics
00:19:58 3 Building
00:20:07 3.1 Components
00:22:19 3.2 Design
00:25:43 3.3 Range lights
00:26:51 3.4 Location
00:28:49 4 Maintenance
00:29:54 5 Preservation
00:31:10 6 Public good
00:31:39 7 See also



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SUMMARY
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A lighthouse is a tower, building, or other type of structure designed to emit light from a system of lamps and lenses and to serve as a navigational aid for maritime pilots at sea or on inland waterways.
Lighthouses mark dangerous coastlines, hazardous shoals, reefs, rocks and safe entries to harbors; they also assist in aerial navigation.  Once widely used, the number of operational lighthouses has declined due to the expense of maintenance and use of electronic navigational systems.