Lighting_Design_Study Flashcards
(18 cards)
What is the difference between point source and indirect lighting?
Point source emits light in multiple directions and creates sharp shadows; indirect lighting reduces glare and spreads light more evenly.
What is a task light?
A light designed for a specific function or job, such as a desk lamp or stair light.
Why are pendants used in lighting design?
They bring the light source closer to the task area, improving illumination and efficiency.
What is the difference between luminaires and lamps?
Luminaires are light fixtures; lamps are the bulbs within those fixtures.
Why are lamp shades used despite reducing light output?
To block direct view of the bulb and reduce glare for human comfort.
What do diffusers and baffles do in a lighting fixture?
They spread light more evenly and prevent direct glare by hiding the light source.
Why is high light quantity important for tasks like reading fine print?
Because human eyes need more light to distinguish fine details and color differences.
Define lighting efficacy.
The effectiveness of a light system in delivering light to the work plane, not just producing lumens.
What is the role of recessed lighting?
Provides directional light often used for task or accent lighting, but limited in spread.
What are cove lights and their advantages?
Indirect lighting hidden in ceiling coves that provides even, ambient illumination without glare.
How do wall washers function in lighting design?
They direct light across a wall surface to highlight architectural features or artwork.
What are up lights used for?
To illuminate objects from below, such as trees or sculptures, for dramatic effect.
What is the benefit of integrating daylight with artificial light?
To reduce energy usage and improve visual comfort by dimming or turning off lights near windows.
How do motion sensors contribute to lighting efficiency?
They turn lights on/off based on occupancy, reducing energy waste in unused spaces.
Why is it inefficient to use general lights in sunlit spaces?
Because natural daylight already provides illumination, making artificial light unnecessary.
What is night sky lighting?
Exterior lighting that minimizes upward light to reduce light pollution and protect wildlife.
How is site lighting different from interior lighting?
Site lighting emphasizes lighting objects and paths, while interior lighting illuminates entire spaces.
How does lighting indicate importance in architectural design?
By selectively illuminating key paths, doors, or objects to guide users and highlight features.
