CS 25.1381 Instrument lights

(a)The instrument lights must –

(1)Provide sufficient illumination to make each instrument, switch and other device necessary for safe operation easily readable unless sufficient illumination is available from another source; and

(2)Be installed so that –

(i)Their direct rays are shielded from the pilot’s eyes; and

(ii)No objectionable reflections are visible to the pilot.

(b)Unless undimmed instrument lights are satisfactory under each expected flight condition, there must be a means to control the intensity of illumination.