BS EN 4731. Aerospace series. Spectral quality of LED luminaires used with photoluminescent marking systems Aerospace transport, Space transport, Air transport, Transportation, Luminaires, Reflectors (light), Photometry (light measurement), Shades (light), Refractors (light), Projectors (light), Lighting tracks, Lighting columns, Diffusers (light), Baffles (light), Troffer luminaires, Suspended luminaires, Recessed luminaires, Ceiling luminaires, Bowl luminaires, Lighting equipment