22 August 2006
Modeling of Faces and Objects: The use of direct/indirect light or light from
multiple directions fills in shadows and renders texture and three-
Reflected Glare: Select and locate luminaires to avoid veiling reflections on
the countertop. Such reflected glare will impair viewing of tasks on the
counter. Locate under-shelf task lights to direct light away from or to either
side of the task.
Horizontal and Vertical Illuminance: Adequate illuminance levels need to
be provided for both horizontal tasks on the counter as well as vertical tasks
on shelves or equipment.
Target Horizontal Illuminance ( 10%): 500 lux (50 fc)
While pharmaceutical tasks require a high light level, a task-ambient system reduces
the amount of light that needs to be provided by the ambient system. Task lighting then
increases the light level where and when it is required.
Recessed ambient lighting equipment often fails to provide the surface brightness
necessary for a comfortable visual environment. Spending all day in such an
environment can lead to eyestrain and fatigue. Surface brightness can be improved by
utilizing the benefits of an indirect / direct luminaire or lens to put more light on the
ceiling or walls. Additionally, wallwashers, where appropriate, illuminate fixed shelves,
or improve the room surface brightness.