# Road Vehicles Lighting Regulations (Northern Ireland) 2000, Schedule 16: Requirement relating to obligatory and optional warning beacons

Extent: N.I.

The light shown by any one warning beacon shall be displayed not less than 60 nor more than 240 equal times per minute and the intervals between each display of light shall be constant.
1 Number:
Sufficient to satisfy the requirements of paragraph 3
2 Position—
Every warning beacon shall be so mounted on the vehicle that the centre of the lamp is at a height not less than 380 mm above the ground.
3 Angles of visibility—
Except in the case of a motor vehicle used for police purposes 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 13
7 Wattage:
No requirement
8 Intensity:
No requirement
9 Electrical connections:
No requirement
10 Tell-tale:
No requirement
11 Other requirements—

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Source: https://www.legislation.gov.uk/nisr/2000/169/schedule/16 (the official version)
Page: https://openlegislation.uk/road-vehicles-lighting-regulations-northern-ireland-2000/schedule-16
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.