Light (L01-L02) Preconditions Flashcards
What does the light concept aim to do?
- promotes exposure to light and aims to create lighting environments that promote visual, mental, and biological health
(reduces circadian phase disruption, improves sleep quality and positively impacts mood and productivity)
Humans and animals have ____ that synchronize physiological functions on a roughly 24-hour cycle called the ____ .
internal clocks
circadian rhythm
Disruption or desynchronization of the _____ has been linked with obesity, diabetes, depression and metabolic disorders
circadian rhythm
Exposure to bright light at night is associated with ______, which in turn can cause negative health effects, such as breast cancer and metabolic and sleep disorders
circadian phase disruption
another word to describe
light exposure in the late night/early morning will shift our rhythms forward
phase advance
another word to describe light exposure in the late afternoon/early night will shift our rhythms back
phase delay
The threshold for human entrainment requires relatively bright light for a long duration. Light exposure has an impact on what?
impact on the mood and reduces symptoms of depression in individuals
Mammals function on an approximately ___ cycle, following what are referred to as circadian rhythms.
___ is the main driver of the circadian system, which controls body processes, such as digestion, the release of certain hormones, body temperature and sleep.
L01 Light Exposure
24 hr cycle
Light
Regularly occupied spaces must achieve what daylight simulation target?
L01 Light Exposure
Target illuminance 19 fc is achieved for >30% of individual unit area throughout 50% of daylit hours of the year
Common spaces that unassigned seating for at least 15% of regular occupants at any given time must achieve what daylight simulation target?
L01 Light Exposure - option 1
Target illuminance 28 fc is achieved for >30% of individual unit area and average illuminance 9 fc is achieved for >95% of individual unit area throughout 50% of daylit hours of the year
What are the interior light requirements for regularly occupied and common areas?
L01 Light Exposure - option 2
a. At least 30% of the regularly occupied area is within a 20 ft horizontal distance of envelope glazing in each floor and/or in each individual unit.
b. Common spaces have unassigned seating and can accommodate at least 15% of regular occupants at any given time. At least 70% of all seating in the spaces is within a 16 ft horizontal distance of envelope glazing.
List 2 building design light requirements for an occupied floor area.
L01 Light Exposure - option 3
a. The envelope glazing area is no less than 7% of the regularly occupied floor area for each floor level or individual unit.
b. The floor plate is no more than 65 ft between opposite walls that each have transparent envelope glazing, and there are no opaque obstructions higher than 3.2 ft within a 20 ft horizontal distance of the transparent envelope glazing.
List the Feature# for circadian lighting design requirements.
L01 Light Exposure - option 4
The project achieves at least one point in Feature L03: Circadian Lighting Design
What is the retina?
L02 Visual Lighting Design
visual cues that are received through images formed on the eye
All indoor and outdoor spaces (including transition areas) comply with the illuminance thresholds specified in one of the following lighting reference Guidelines:
L02 Visual Lighting Design
- IES Lighting Handbook 10th Edition.
- EN 12464-1&2: 2011.
- ISO 8995-1:2002(E) (CIE S 008/E:2001).
- GB50034-2013.
- CIBSE SLL Code for Lighting.
