In high rooms the luminaires are beyond the direct field of vision.
As the room height increases the brightness of the wall decreases, if the lighting remains constant. Wallwashers are characterised by the even progression of brightness along the wall.
Lens wallwashers have special lens reflector systems. Linear light sources for wallwashing with fluorescent lamps provides a perfectly uniform brightening of the room.
Using a Softec lens, an extremely even illumination of the whole wall can be achieved even in the higher area right up to the ceiling. The perimeter illumination out of a haunch is positioned directly on the wall.
It produces a grazing light effect and emphasises the surface texture.
The evenness of the wallwashing is secondary.