22 August 2006
Color Appearance and Color Contrast: Because speakers and
presentations change, lamps should render color well. Additionally, the
room surface finishes need to be carefully considered and illuminated with
the appropriate lamp.
Direct Glare: Since occupants are viewing the lecturer and observing
presentation information, minimize glare from overhead electric lighting.
Modeling of Faces and Objects: The speaker should be lighted with
spotlights from both sides rather than straight on. This will prevent harsh
shadows while still modeling the speaker's face. Such lighting increases
the recognition of facial expressions and the effectiveness of non-verbal
Horizontal and Vertical Illuminance: Horizontal illuminance is important for
the occupants taking notes. Vertical illuminance is important to view
instructors, students, and presentations.
Target Horizontal Illuminance ( 10%): 100 lux (10 fc) for house ambient
lighting; 500 lux (50 fc) for speaker lighting.
The lighting for an auditorium should be made up of multiple components. This design
approach allows users flexibility in controlling the lighting. It also saves energy by using
only the lighting power that is required for a particular event or program. Additionally,
this "system" approach (as well as the goal of lighting surfaces) encourages integration
of light and architectural elements.
Ambient Lighting: The ambient lighting may include multiple components
to light the walls, ceiling, and other elements in the space. Recessed
coves or suspended pendant uplights might light the ceiling surface.
Acoustic panels may form coves for indirect lighting. Additional ambient
lighting may occur at the perimeter of the auditorium in the form of wall
House Lighting: Downlights can provide additional house lighting for
maintenance and cleaning or at a time when higher light levels are
required. In combination with the ambient lighting, an illuminance range of
up to 300 lux (30 fc) could be achieved.
Stage Lighting: Stage lighting will highlight a lecturer and presentation.
Egress Lighting: Lighting along the edge of the aisles or possibly in the chairs can
illuminate the aisles to some minimum level during a presentation to allow for safe
With the lighting for the space divided into multiple components (or zones), these zones
can then be configured with a control system to make up preset "scenes". Each scene
is a combination of different zones set to "on" (or "off") and dimmed to a selected level
of light. This selected combination corresponds to a particular event or program. Once
the scenes are programmed, the push of one button raises and lowers all of the lights to