Luminous Efficacy in aircraft design refers to the efficiency with which a light source produces visible light, typically measured in lumens per watt (lm/W). It quantifies how effectively a light source converts electrical power into visible light output. Luminous efficacy is important in aviation for evaluating the efficiency and brightness of lighting systems, which can impact safety and energy consumption. The formula for luminous efficacy and its SI unit are as follows:
Luminous Efficacy Formula: The formula for calculating luminous efficacy (K) is based on the luminous flux (Φ_v) produced by a light source and the electrical power (P) consumed by the source:
- K: Luminous Efficacy, measured in lumens per watt (lm/W).
- Φ_v: Luminous Flux, measured in lumens (lm).
- P: Electrical Power, measured in watts (W).