A restaurant's atmosphere is built largely with light. From the right color temperature to table lighting — every step of a layout that boosts comfort and sales.

Guide · Concept1 min

Color Temperature Guide: 2700K or 4000K?

Warm or cool? Color temperature is one of the most decisive choices for a space's atmosphere. We explain which Kelvin value fits where, step by step.

Guide · Technical1 min

Dimmers and Smart Control Systems

Can a single space take on different moods through the day? With dimmers and control systems, yes. From phase-cut dimming to DALI — how to choose the right system.

Guide · Space1 min

Store & Window Lighting: Light That Sells

In retail, light is a marketing tool. From the window that draws customers in to the display light that makes products shine — the rules of sales-driving lighting.

Key terms

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UGR (Glare Rating)Unified Glare Rating measures how much a lighting layout causes discomfort glare. A lower value means less glare.LumenlmThe total amount of visible light a source emits in all directions. A fixture's brightness is defined by lumens, not watts.LuxlxThe intensity of light falling on a surface, measured in lumens per square meter (lm/m²). It is the core unit for illuminance levels.CRI / RaRaThe Color Rendering Index measures how accurately a light shows colors, on a 0–100 scale. Values of 90 and above are considered high quality.Kelvin / Color TemperatureKExpresses the warmth of light, measured in Kelvin (K). Low values (2700K) give warm/yellow light, high values (4000K+) give cool/white light.IP RatingA two-digit code showing a fixture's protection against dust and water (e.g. IP65). The first digit denotes solids, the second water resistance.DALIDigital Addressable Lighting Interface; a digital protocol where each fixture can be addressed and controlled individually. Ideal for large, flexible projects.Efficacy (lm/W)lm/WThe lumens a fixture produces per watt; a measure of energy efficiency. The higher the value, the less energy is used for the same light.Lumen Maintenance (L70/L80)Describes how an LED loses brightness over time. L70 is the operating time at which a fixture drops to 70% of its initial lumens (e.g. 50,000 hours).

Latest insights

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Human-Centric Lighting: Light and Health

Insight15 June 2026 · 1 min

One lettera month

New guides, updated terms and notes on the industry. No product promotion — only things worth reading.