01 · Lighting encyclopedia
Fundamentals of light and light quality
The quantities and properties of light that determine light levels, visual comfort and how colours and materials are perceived. For anyone who wants to understand the brief before selecting luminaires.
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Koľko lumenov potrebujem? Výpočet osvetlenia pre každú miestnosť
Koľko lumenov potrebujete do obývačky, kuchyne či spálne? Pochopte rozdiel medzi lumenmi, luxmi a wattmi a vypočítajte orientačnú potrebu svetla podľa m².
Read Koľko lumenov potrebujem? Výpočet osvetlenia pre každú miestnosť- 01Lumens, lux and wattsPillar article
Koľko lumenov potrebujem? Výpočet osvetlenia pre každú miestnosť
Koľko lumenov potrebujete do obývačky, kuchyne či spálne? Pochopte rozdiel medzi lumenmi, luxmi a wattmi a vypočítajte orientačnú potrebu svetla podľa m².
Article - 02Colour rendering (CRI)
CRI and colour rendering: why CRI 90+ belongs in a premium interior
CRI (Ra) describes how faithfully a light source renders colours compared to a reference. In residential the minimum today is CRI 90, in Retail and Showroom CRI 95+ with R9 tracked separately.
Article - 03Colour rendering (CRI)
Why CRI 95+ changes everything in an interior
The colour rendering index (CRI) decides whether oak looks like oak and leather like leather. Here is the difference between CRI 80, 90 and 95+ in real examples.
Article - 04Colour temperature (CCT)
Colour temperature: 2200 K, 2700 K, 3000 K or 4000 K?
CCT in kelvins decides whether a space reads warm, neutral or clinical. Premium interiors choose between 2700 K and 3000 K; the most atmospheric reach for 2200 K.
Article - 05Colour temperature (CCT)
2700 K, 3000 K alebo 4000 K? Ako vybrať správnu farbu svetla do interiéru
Neviete, či vybrať svetlo 2700 K, 3000 K alebo 4000 K? Praktické porovnanie farby svetla pre obývačku, kuchyňu, kúpeľňu, spálňu aj pracovňu.
Article - 06Colour temperature (CCT)
Why luxury hotels use warm light
Luxury hotels don't use warm light by accident. Light directly affects the nervous system, emotions and the sense of comfort. Here is why fine hotels treat colour temperature in a completely different way than ordinary interiors.
Article - 07Glare and visual comfort (UGR)
UGR and glare: the visual-comfort threshold at work and at home
UGR (Unified Glare Rating) quantifies glare in the field of view. UGR < 19 is the office norm, UGR < 16 for video meetings.
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Practical tool
Lighting calculator
Convert lumens and lux into a real room straight away. Estimate required illuminance in lux, total lumen output, luminaire count and spacing.
Calculate luminaire countRelated topic areas
Concrete briefs for individual space types — from kitchens, bathrooms and bedrooms to offices, retail and hotels. It helps architects and investors set the right illuminance, layering and colour rendering per room.
Choosing fixture type and optics, luminaire count and spacing, layering and the mistakes that are hard to fix on site — the decisions made while drawing the plan, calculator included.
Dimming, control protocols and smart systems that define comfort and flexibility. For designers and clients resolving scenes, DALI, KNX and Tunable White at the electrical-design stage.