4 - Architectural Lighting

heat

Some materials absorb light, converting it to?

transmission

Other materials allow _______, letting light pass through partially or fully

window, translucent materials

Absorption and Transmission affects lighting design with ______ and ______

Transmission

Reflection

Absorption

Wave nature

explains interference and diffraction

particle nature

explain energy quantization

Wave and Particle Nature

Both are crucial in designing systems

Lumen (lm)

Total light output

Candela (cd)

Light intensity in a particular direction

Lux (lx)

Illuminance or luminous flux per unit area

Foot-candle (fc)

Imperial measure equivalent to lux

light

Quantifying _______ allows designers to meet visual needs, ensure comfort, and optimize energy use in architectural spaces

Inverse Square Law

states that light intensity decreases proportionally to the square of the distance from the source 

Inverse Square Law

This law guides lighting designers in fixture placement to achieve balanced illumination

four

Inverse Square Law means doubling the distance from a light source spreads the same amount of light over ____ times the area, reducing intensity sharply

Illuminance

Quantity of Light

Illuminance

the amount of light on a surface measured in lux or foot-candles, critical in determining lighting levels

A. Luminance, B. Illuminance

Lumens

Luminous Flux

Candelas

Luminous intensity

Candelas / m²

Luminance

Lux

Illuminance