Human Centric Lighting & Wellness Flashcards
7 cards from real CLC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Human Centric Lighting & Wellness flashcards as text
A school classroom implements dynamic lighting. Which schedule modification would most improve afternoon student alertness in a US school context?
Answer: Increasing melanopic illuminance and CCT to 5000K+ after the midday break
Boosting melanopic illuminance and CCT after the midday circadian dip provides the alerting stimulus needed to counteract post-lunch drowsiness.
Which US green building standard explicitly addresses circadian lighting as part of its occupant wellness scorecard?
Answer: WELL Building Standard v2
The WELL Building Standard v2 includes dedicated circadian lighting features (L07 Circadian Lighting Design) as part of its Light concept scorecard.
In dementia care facilities, what is the most critical HCL design goal based on clinical research?
Answer: Providing high daytime light exposure to consolidate sleep-wake cycles and reduce sundowning
High-intensity daytime lighting in dementia care has been clinically shown to consolidate disrupted circadian rhythms, reduce sundowning agitation, and improve nighttime sleep.
A commercial office building owner wants to demonstrate HCL compliance for a lease. Which measurement device is most appropriate for verifying melanopic EDI at the eye level?
Answer: Spectroradiometer combined with CIE S 026 weighting functions
A spectroradiometer measures the full spectral power distribution, which can then be weighted by CIE S 026 action spectra to calculate accurate melanopic EDI values.
Research on healthy aging and HCL suggests that older adults typically require how much more light than younger adults to achieve the same circadian stimulus?
Answer: 2–3 times more
Age-related lens yellowing and pupillary miosis significantly reduce short-wavelength light reaching the retina, often requiring 2–3 times more light for equivalent circadian effect.
What is 'social jetlag' in the context of HCL and its health implications?
Answer: Chronic circadian misalignment between biological clock and social/work schedules
Social jetlag describes the chronic mismatch between one's internal circadian clock and externally imposed work/social schedules, associated with metabolic and cardiovascular health risks.
An HCL control system uses 'personal tuning' allowing occupants to adjust their workstation light color and intensity. What HCL design principle does this support?
Answer: Individual chronotype and sensitivity accommodation
Individual chronotype (morningness-eveningness tendency) and light sensitivity vary significantly; personal tuning allows each occupant to optimize their own circadian stimulus.