Vertical hemicylindrical illuminance or hemicylindrical illuminance
The average illuminance on the surface of a vertical hemicylinder. For walkways, the vertical illuminance is specified at a height of 1.5 m from the road surface.
The average illuminance on the surface of a vertical hemicylinder. For walkways, the vertical illuminance is specified at a height of 1.5 m from the road surface.