# Road Vehicles Lighting Regulations (Northern Ireland) 2000, Schedule 22B: Warning lights


A warning light shall—
(a) have an illuminated area with a diameter of at least 100mm and be amber in colour;
(b) have a horizontal angle of visibility of 80° outwards and 45° inwards and a vertical angle of visibility of 15° above and below the horizontal;
(c) be a single intensity lamp which complies with the flash rate and luminous intensity as set out in the United Nations Economic Commission for Europe (UNECE) Regulation 65 “Uniform Provisions Concerning the Approval of Special Warning Lamps for Motor Vehicles” for category X lamps; and
(d) flash in such a manner that one light is shown when the other is not shown.

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Source: https://www.legislation.gov.uk/nisr/2000/169/schedule/22B (the official version)
Page: https://openlegislation.uk/road-vehicles-lighting-regulations-northern-ireland-2000/schedule-22B
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.