suspension length, <of a luminaire in an interior>
distance between the ceiling and the light centre of the luminaire
Note 1 to entry: The suspension length is expressed in metres (m).
Note 2 to entry: This entry was numbered 845-09-68 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-1290 in CIE S 017:2011.