Why Lighting Should Be the First Design Decision, Not the Last

Here is how most projects work. The architect designs the shell. The interior designer selects the finishes, furniture, and palette. The lighting consultant — if there is one — enters the conversation once the ceiling has been fixed, the floor finish approved, and the wall colour signed off.

By that point, every decision that determines how light behaves in the space has already been made. And none of them considered light.

Ceiling height determines which luminaire types are viable and what lux levels are achievable. Wall reflectance determines how much light you actually need — a room with dark walls may require 60% more fittings than the same room in white to reach the same lux level. Floor finish determines whether light pools on the surface or disperses into the space. The position of architectural features — columns, beams, reveals, niches — determines what can be highlighted and what will always be in shadow.

When all of those decisions are made without a lighting strategy, the lighting designer is left solving a problem they were not invited to help prevent.

The financial consequences are real. Retrofitting lighting infrastructure after construction is significantly more expensive than integrating it correctly during the build. Cutting cove channels after a ceiling is plastered, rerouting conduit because the fixture positions changed, replacing fittings because the specified product does not work in the actual space — these are the costs of a late decision.

The better model is simple. Bring the lighting intent into concept stage. Not necessarily a full scheme — but a clear understanding of how the space will be lit, what layers will be used, and what the ceiling, wall, and floor finishes need to support. Everything that follows becomes easier, cheaper, and better.

The best lighting in a project is invisible — because it was considered from the beginning.