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The Lightologist
Colour Rendering Index (CRI): Why Two Lights Can Look Completely Different
Walk into a luxury boutique, and the fabrics seem rich, the leather looks premium, and every colour feels vibrant. Walk into a poorly lit store, and the very same products can appear dull, flat, and uninspiring. What changed? Not the products. Not your eyes. Just the quality of light. That difference is largely explained by Colour Rendering Index (CRI). What is CRI? Colour Rendering Index, commonly known as CRI, measures how accurately a light source reveals the true colours
3 min read
Retail Lighting — A Ready Reckoner for Stores & Showrooms
Contrast ratios, colour rendering and lux targets that make retail lighting sell — for sales floors, feature displays, windows, fitting rooms and more.
2 min read
Commercial & Office Lighting — A Ready Reckoner
Illuminance, glare (UGR) and colour targets for workplaces — aligned with EN 12464-1 — plus the ten rules for comfortable, productive office lighting.
2 min read
Hospitality Lighting — A Ready Reckoner for Architects & Designers
Lux, colour temperature and CRI targets for lobbies, restaurants, bars and guest rooms — with the ten rules that make hospitality spaces feel considered.
2 min read
Residential Lighting — A Ready Reckoner for Architects & Designers
Recommended lux, colour temperature and CRI for every room in the home — plus ten principles and a specification checklist for residential projects.
2 min read
The Vocabulary of Light
Thirty weeks. Thirty foundational ideas. One complete vocabulary for thinking, talking, and designing with light. Here is what you now know — and why it changes everything that follows.
2 min read
Light Is Not a Utility — The Case for Treating It as a Material
Somewhere in the history of construction, light was reduced to a line item. This is the single most expensive misconception in the built environment — and here is the evidence.
2 min read
Why Every Lighting Brief Starts With the Sun
Before a single luminaire is specified, the most important question in any lighting brief is what the natural light does in this space, at what times, and in what seasons. Everything else follows from that answer.
2 min read
Natural Light as the Reference Standard in Lighting Design
Every lamp ever manufactured has been compared against one benchmark it has never fully matched. Understanding what natural light actually is — and what it does — makes you a better specifier of everything else.
2 min read
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