installation azimuth, <in road lighting>
angle a chosen reference direction makes with the vertical plane through a given point on a road surface and the first axis of a luminaire, when the luminaire is at its tilt during measurement
Note 1 to entry: to entry:
Note 2 to entry: The installation azimuth is expressed in radian (rad) or degree (°).
Note 3 to entry: This entry was numbered 17-585 in CIE S 017:2011.