CID Lighting Design and Technology Flashcards

Which lighting layer provides general illumination throughout a space and is considered the base layer of a lighting plan?

Answer: Ambient lighting

Ambient lighting serves as the foundational layer that provides overall illumination for a space.

What is the unit of measurement used to quantify the amount of light falling on a surface?

Answer: Foot-candle

A foot-candle measures illuminance, which is the amount of light (lumens) falling on one square foot of surface.

Which color rendering index (CRI) value is considered the minimum acceptable for spaces requiring accurate color perception, such as retail showrooms?

Answer: CRI 80

A CRI of 80 or above is considered the minimum acceptable threshold for spaces where accurate color rendering is important.

In interior design, what does CCT stand for in reference to light sources?

Answer: Correlated Color Temperature

CCT (Correlated Color Temperature) describes the warmth or coolness of white light, measured in Kelvin.

Which type of lighting is specifically designed to draw attention to artwork, architectural features, or display objects?

Answer: Accent lighting

Accent lighting is used to highlight specific objects or features, typically requiring three times more light than ambient levels.

What is the recommended illuminance level (in foot-candles) for typical office task lighting per IES standards?

Answer: 50–100 fc

The IES recommends 50–100 foot-candles for general office task lighting to ensure comfortable and productive work conditions.