What Is LxBy (L90B10, L80B10, L70B50)?

LxBy parameter specifies when the luminaire’s lifetime will expire and how large the margin of error is in its operation. The standard LxBy terminology includes two indicators. The L value indicates the minimum of the luminous flux to be maintained during a certain period of use. The B value indicates the error rate. This refers to the time it takes for y% of the LEDs to reach x% of the initial flux.