Lighting encyclopaedia

Koľko lumenov potrebujete do obývačky, kuchyne či spálne? Pochopte rozdiel medzi lumenmi, luxmi a wattmi a vypočítajte orientačnú potrebu svetla podľa m².

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.

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.

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.

Neviete, či vybrať svetlo 2700 K, 3000 K alebo 4000 K? Praktické porovnanie farby svetla pre obývačku, kuchyňu, kúpeľňu, spálňu aj pracovňu.

The kitchen is the hardest room to light. Here are five mistakes we keep solving for clients — and how to avoid them at the design stage.

A bathroom is not a utility room. Vertical light at the mirror, IP-rated fittings in the shower zone and a warm scene at the bath define the premium experience.

A bedroom needs soft ambient, precise reading light and a Warm Dim evening mode. Downlights directly above the bed never belong.

A wardrobe is where outfit decisions happen. High CRI, vertical light and integrated linear strips in the shelves are the minimum.

Koľko luxov má mať kancelária? Prečo 500 lx nestačí — UGR, rovnomernosť, CRI, farebná teplota a Human Centric Lighting v praxi.

DALI (IEC 62386) is the open digital protocol for architectural lighting. Each fitting has an address, scenes are software-defined, dimming is precise and flicker-free.

DALI is not merely a „smart switch“. It is a digital bus that changes how a space responds to the time of day, to scenes and to the user.

Good dimming is more than a slider. Driver, curve and method together decide whether the light truly breathes or pulses.

The control platform defines comfort for the next 10–15 years. Each one has its own logic, strengths and typical client.

Biodynamic lighting mimics the daily course of natural light — in both intensity and spectrum. It is not just an automated warm-to-cool colour shift.

Professional lighting is not one main light. It is the layering of three functions: ambient, task and accent.

One main light, 4000 K everywhere, cheap drivers, no scenes. Half of these issues are fixed by planning before electrical engineering.

Koľko lumenov potrebujete do obývačky, kuchyne či spálne? Pochopte rozdiel medzi lumenmi, luxmi a wattmi a vypočítajte orientačnú potrebu svetla podľa m².

The kitchen is the hardest room to light. Here are five mistakes we keep solving for clients — and how to avoid them at the design stage.

UGR (Unified Glare Rating) quantifies glare in the field of view. UGR < 19 is the office norm, UGR < 16 for video meetings.