Designing personalised, efficient circadian lighting: Proposing lighting designs for private homes based on the non-visual impact of light
Translated title
Designing personalised, efficient circadian lighting
Author
Hauge, Mads Lind
Term
4. Term
Education
Publication year
2019
Abstract
This thesis explores how to design personalized, efficient circadian lighting for private homes, focusing on the non-visual effects of light and the entrainment of the circadian system to support healthy sleep–wake cycles and wellbeing. The core question is how to specify user-tailored light scenarios—in terms of spectral and photometric characteristics, timing, duration, placement, and control—to deliver meaningful circadian impact across age groups. The method combines a review of circadian science and metrics (including Circadian Stimulus and Equivalent Melanopic Lux), an analysis of existing products, user insights for three groups (children/adolescents, adults/students, and older adults), and the definition of design parameters (circadian timeslots, light characteristics, control and interface, form factor, luminaire type, and placement). This leads to three personalized lighting scenarios with recommendations on what light to use, when, for how long, and how to position and control it, followed by a survey to validate selected parameters. The work underscores the importance of timing, blue-enriched morning light and evening dimming, exposure duration, and age-related differences in light sensitivity. It concludes that fully personalized prescriptions are challenging in practice due to many variables; a more hands-on, user-engaged approach is recommended to verify and refine designs.
Dette speciale undersøger, hvordan man kan designe personlig, effektiv døgnrytmelysning i private hjem med fokus på lysets ikke-visuelle effekter og entrainment af døgnrytmen for at understøtte søvn-vågen-cyklussen og trivsel. Problemstillingen er, hvordan man specificerer brugerrettede lysscenarier – med hensyn til spektrale og fotometriske egenskaber, timing, varighed, placering og styring – så de giver en meningsfuld døgnrytmepåvirkning på tværs af aldersgrupper. Metodisk bygger arbejdet på en gennemgang af circadian-viden og relevante målemetrikker (bl.a. Circadian Stimulus og Equivalent Melanopic Lux), analyse af eksisterende produkter, brugerindsigt i tre grupper (børn/unge, voksne/studerende og ældre) samt fastlæggelse af designparametre (døgnslots, lysets karakteristika, styring og interface, formfaktor, armaturtype og placering). Dette munder ud i tre personaliserede lysscenarier med anbefalinger for hvad, hvornår, hvor længe og hvordan lyset bør anvendes, efterfulgt af et spørgeskema til at validere udvalgte parametre. Specialet fremhæver betydningen af timing, bølgelængde/indsprøjtning af blåligt lys om morgenen og dæmpet lys om aftenen, eksponeringens varighed samt aldersrelaterede forskelle i lysfølsomhed. Konklusionen er, at fuld personalisering er vanskelig i praksis på grund af mange variable; en mere praktisk, brugerinddragende tilgang anbefales for lettere at afprøve og forfine designene.
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