luminous efficacy /ENG-ELECTRICAL/
[DE] photometrisches Strahlungsäquivalent
[EN] luminous efficacy
[FR] efficacité lumineuse d' un rayonnement
lamp efficacy,luminous efficacy /ENG-ELECTRICAL/
[DE] Lichtausbeute
[EN] lamp efficacy; luminous efficacy
[FR] efficacité lumineuse