When choosing beam angles, many lighting professionals ask: if I switch from a wide beam to a narrow one, shouldn’t the luminous flux stay the same? It may seem logical — but in practice, that approach doesn’t hold when we consider how light is distributed.
Narrow beams increase illumination.
A narrow beam directs light onto a smaller surface. Because the light doesn’t spread out as much, the illuminance level — measured in lux — increases. Wider beams distribute the same output across a larger area, lowering the light level but enhancing general coverage.
If both versions emitted the same luminous flux, the narrow beam would produce a much higher lux level on the target — often too intense or visually uncomfortable. That’s why well-designed luminaires calibrate flux according to beam angle, ensuring consistent performance across different applications.
Why the difference matters.
Imagine a luminaire with 1,000 lumens mounted at a 3-metre height.
With a narrow 15° beam, the light covers around 0.5 m² — resulting in 2,000 lux on the surface.
A wide 60° beam covers closer to 4 m² — reducing that to 250 lux.
To achieve the same light level with the wider beam, you’d need significantly more output.
Beam tuning supports balance and comfort.
Adjusting luminous flux based on beam angle is not about power — it’s about precision. Narrow beams define materials, highlight textures and draw the eye. Wider beams soften the space and offer broader illumination. Both serve a purpose in layered lighting design.
This approach helps avoid harsh transitions, reduces visual discomfort and supports a coherent experience — whether you’re lighting a gallery, boutique, or refined hospitality setting.
Caro.
An excellent example of how beam angle choice supports visual design is the Caro track spotlight by Karizma Luce. Within a single project, Caro allows you to combine narrow and wide beam angles — from 12° to 60° — to suit different functions and zones. Caro is part of a broader family, including a surface-mounted version, a surface-recessed model, and even a trackspot with an asymmetrical beam — ideal for cohesive and purpose-driven lighting across any retail or hospitality setting.
Design with intent.
Beam angle isn’t just a specification — it’s a tool for spatial control. By aligning luminous flux with the beam angle, you get the right light level where it’s needed — without excess.
Narrow beams need less luminous flux to achieve the same lux — because the light is concentrated where it matters.
Led’s delight!
