In other words, those methanogenesis improve the coefficient of utilization.

The coefficient of utilization of passenger seats was 68%:.

A coefficient of utilization (CU) is a measure of the efficiency of a luminaire in transferring luminous energy to the working plane in a particular area.

A coefficient of utilization, representing the fraction of light that is directed to the working plane, is supplied by manufacturers for each luminaire design for the various calculated room cavity ratios.