PAGE 153

What is the definition of general lighting?

• Lighting in which luminaires distribute 90% to 100% of the emitted light downward.

• Lighting designed to provide a uniform level of illumination throughout an area.

• Lighting from luminaires that emit an approximately equal distribution of light upward and downward.

• Lighting in which luminaires distribute 60% to 90% of the emitted light downward.

What is the purpose of task lighting?

• To emphasize by illuminating with a strong light.

• To call attention to a particular object or feature in the visual field.

• To illuminate something from behind in order to enhance depth.

• To provide strong illumination for a visually demanding activity.

What is the sensation produced by any brightness within the visual field that is sufficiently greater than the luminance to which the eyes are adapted?

• Glare

• Adaptation

• Highlight

• Brightness ratio

What is the difference between soft light and hard light?

• Soft light produces little contrast and poorly defined shadows, while hard light produces high contrast and distinct shadows.

• Soft light produces high contrast and distinct shadows, while hard light produces little contrast and poorly defined shadows.

• Soft light is direct light, while hard light is diffuse light.

• Soft light is glare, while hard light is adaptation.

What is the term for glare that reduces visibility or impairs visual performance?

• Reflected glare

• Direct glare

• Discomfort glare

• Disability glare