§ 25.1381 - Instrument lights.

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The instrument lights must—

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

Be installed so that—

Their direct rays are shielded from the pilot's eyes; and

No objectionable reflections are visible to the pilot.

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