Lamp Lumen Maintenance Factor

The LLMF (Lamp Lumen Maintenance Factor) expresses the usual reduction of the luminosity over the lifetime, e.g. : By a factor of 0.96 after 2000 h: After 2,000 hours the illuminant still emits 96% of the luminosity when new. "m" = operation of magnetic ballasts / "e" = Operation of electronic ballasts

See also:

Lumen
Luminosity
Lifetime