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. For demanding interiors, consider CRI 90+ and check R9 separately; this is design advice, not a universal standard requirement.
Article - 03Colour rendering (CRI)
Why CRI 95+ changes everything in an interior
CRI describes average fidelity for test colours. We explain what Ra 80, 90 and 95+ can tell you and what needs checking separately on materials.
Article - 04Colour temperature (CCT)
Colour temperature: 2200 K, 2700 K, 3000 K or 4000 K?
CCT in kelvins describes the colour appearance of white light. For a warmer atmosphere, consider 2700–3000 K or 2200 K; the overall impression also depends on intensity, materials and other lighting properties.
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
Warm, dimmed light helps create an evening hotel atmosphere. We explain CCT, intensity, layering and control without promising health outcomes.
Article - 07Glare and visual comfort (UGR)
UGR and glare: the visual-comfort threshold at work and at home
UGR indicates discomfort glare under specific conditions. It depends on luminaires, room geometry, reflectances and observer position; it does not describe all aspects of visual comfort.
Article
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.