light-light transfer efficiency
lightweight Light-Expansion Concrete
White Light Light-Emitting Diode
luminous efficacy of radiant flux
radiant flux
辐射通量
辐射流
辐射通量、辐射功率
辐射光通量
辐通量
辐射通率
辐射束
radiant flux [surface] density
Radiant Flux Spectral Distribution
anti-visible light and infrared light
breakdown light {NUC light}
digital light processing DLP light source