# The Road Vehicles Lighting Regulations 1989, Paragraph 3

Extent: E+W+S

Angles of visibility–
The light shown from at least one beacon (but not necessarily the same beacon) shall be visible from any point at a reasonable distance from the vehicle or any trailer being drawn by it.
4 Markings:
No requirement
5 Size of illuminated area:
No requirement
6 Colour:
Blue, amber, green or yellow in accordance with Regulation 11
7 Wattage:
No requirement
8 Intensity:
No requirement
9 Electrical connections:
No requirement
10 Tell-tale:
No requirement

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Source: https://www.legislation.gov.uk/uksi/1989/1796/schedule/16/paragraph/3 (the official version)
Page: https://openlegislation.uk/road-vehicles-lighting-regulations-1989/schedule-16/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.