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40 AIR REGULATIONS, 1938 II. At every land aerodrome open to public use and used for night flying, the following provisions shall apply during the working hours of the night service:–– (a) Lighting of obstructions. Fixed red lights shall be exhibited:–– (1) On all obstructions within the landing area which constitute a danger to aircraft in motion on the landing area; (2) As far as possible, on all obstructions within 1 mile of the boundary of the landing area and constituting a danger to aircraft approaching or leaving the aerodrome in a normal manner. In case it should be impossible to exhibit fixed red lights on such obstructions, their horizontal projection and the centre of the obstructions shall, as far as possible, be clearly indicated by synchronized red flashing or occulting lights, placed on a level with or near to the ground. (b) Lighting of landing T and of wind indicators. The landing T, if used, and at least one of the wind indicators, shall be illuminated with fixed lighting, preferably white. (c) Lighting of signals. The signals displayed in the signal area shall be suitably illuminated. (d) Lighting of landing area. (1) The landing area or the part thereof on which landings should be made shall be illuminated by a floodlight or floodlight system during landing manoeuvres; (2) In default, one of the following methods may be used:–– First Method: A line of lights spaced 165 feet apart shall be laid out on the ground, consisting of a central section of six white lights to indicate that landings should be made on the adjacent portion of the landing area and on either side of this line, with at least two green lights at one end, and at least two red lights at the other end to indicate that landings should be made from the direction of the green lights towards the red lights. Second Method: Lights shall be laid out on the ground in the form of a T, the long arm of which shall be composed of at least four lights in a line