Light Planner is a free, professional lighting calculator you run straight in your browser — no download, no licence, no account. Set up your room, pick a fixture, and get a point-by-point EN 12464-1 check in seconds: average lux, uniformity, a false-colour map and a full parts list. It’s a fast, free alternative to DIALux for everyday lighting design.

What Light Planner does

It’s a real point-by-point calculator, not a rule-of-thumb estimator:

• EN 12464-1 room targets — pick the space (office, retail, warehouse, classroom, corridor…) and it loads the maintained illuminance, uniformity and glare targets for you.
• Point-by-point illuminance with reflectance inter-reflection and a proper maintenance factor (CIE 97).
• False-colour map, isolux contours and a value grid — see exactly where the light lands, and where it doesn’t.
• Uniformity (U₀), average / min / max lux, cylindrical & wall illuminance, and a computed UGR.
• Any room shape — rectangles, L/U/T shapes, or trace your own floor plan to scale.
• LED strips as continuous runs — including a perimeter / cove mode that runs the strip all the way around the walls.
• Energy panel — W/m², W/m²·100 lx, lm/W, kWh/year and running cost.
• 3D view, emergency-lighting check (EN 1838), daylight, furniture shadows, and road / outdoor (EN 13201).
• Exports — a clean customer PDF report, parts & lux-grid CSV, plan DXF, CAD DXF, 3D OBJ and BIM IFC.

You can calculate with our HiluX fixtures, or add your own luminaire by specs or by uploading an IES/LDT file. Multiple fixture types can share one room.

Real calculations, professional results

Light Planner runs genuine point-by-point, radiosity-based calculations to EN 12464-1 — real photometry, not rules of thumb. Set up a room and you get a confident, standards-checked layout in seconds, with a clean PDF report you can hand straight to a client or contractor. It’s the speed of a browser tool with the substance of a desktop calculator.

There’s a full manual built in

Click 📖 Manual inside the tool for a complete, plain-language user guide — every input explained, the standards it uses, worked examples and how to read the results. No sign-up, no PDF to hunt down.

Free — and we’d love your feedback

We built Light Planner because good lighting decisions should be easy to reach. It costs nothing to use, and it keeps getting better — a lot of what’s already in it came from real feedback.

• Have a suggestion or hit a bug? Email us at [email protected] — we read every message.
• Want a quote on the fixtures in your plan? Build your layout, then hit Request a quote in the tool — it opens an email with your plan — or write to [email protected] and we’ll price it (and help source anything we don’t make ourselves).

Light Planner is a free tool from Light Solutions ApS, makers of HiluX professional LED lighting.