Move beyond lamp count
Increase room size without changing the grid and watch the lowest value and uniformity fall.
LUXGRID · Interactive lighting education
Lux Lab.See light behave.
Change the room, lamp grid, mounting height, lumen output and beam angle. The field responds instantly so you can explore how lighting decisions affect coverage and uniformity.
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Estimated average193 lx
Estimated lowest61 lx
Uniformity0.32
Layout25 lights
X axis · 30.0 mY axis · 30.0 m12345678910111213141516171819202122232425
Do not use these numbers in a project. This is a conceptual teaching model, not a calibrated lighting calculation. A professional DIALux study uses real IES/LDT photometry, geometry, reflectance, maintenance factors and verified calculation surfaces.
See spread versus intensity
Mounting height changes how beams overlap. More spread does not automatically mean enough light.
Compare beam angles
Narrow and wide beams distribute the same lumen output differently across the working plane.
Beginner lighting guide
A simple lux calculator for quick layout experiments.
Use this free 2D lighting calculator to explore how room dimensions, fixture quantity, lumens, mounting height and beam angle influence estimated light coverage. It is built for learning and early comparison—not final design or compliance.
What is a simple lux calculator?
It is an educational tool for exploring how room size, fixture quantity, lumen output, mounting height and beam angle can affect estimated illuminance and uniformity.
How do I estimate how many lights a room needs?
Enter the room dimensions, height and lumens per fixture, then change the lights on each axis. Compare the estimated average lux, minimum lux and spacing as you test layouts.
Is LuxLab free to use?
Yes. The beginner LuxLab is free and works directly in your browser. LuxLab Pro is also free when you want an advanced interactive 3D view.
Can this replace a DIALux calculation?
No. LuxLab is uncalibrated and educational. A real project requires verified IES or LDT photometry, accurate geometry and a professional DIALux calculation.