tilt during measurement (of a luminaire) [θm]

angle between a defined datum axis related to the luminaire and the horizontal when the luminaire is mounted for photometric measurement

Unit: rad, °

NOTE The defined datum axis may be any feature of the luminaire, but generally for a side- mounted luminaire it lies in the mouth of the luminaire canopy, in line with the spigot axis. Another commonly used feature is the spigot entry axis.

Theme by Danetsoft and Danang Probo Sayekti inspired by Maksimer