ED Decision 2014/013/R
(a) A signalling lamp should be provided at a controlled aerodrome in the aerodrome control tower.
(b) Characteristics:
(1) A signalling lamp should be capable of producing red, green and white signals, and of:
(i) being aimed manually at any target as required; and
(ii) giving a signal in any one colour followed by a signal in either of the two other colours.
(2) The beam spread should be not less than 1° or greater than 3°, with negligible light beyond 3°. When the signalling lamp is intended for use in the daytime, the intensity of the coloured light should be not less than 6 000 cd.
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