Light Planner is a free, professional lighting calculator you run straight in your browser — no download, no licence, no account. It does fast EN 12464-1 checks, point-by-point illuminance, false-colour maps, uniformity, energy and much more. We built it, and we’re giving it away. Open Light Planner →
Why we built it
Serious lighting design usually means DIALux or Relux: powerful desktop software, but a heavy download, a steep learning curve, and more than most people need for a quick, honest answer to “how many fixtures, and will it hit the target lux?”
We wanted something a specifier, an electrician, an architect or a facility manager could open in ten seconds and actually understand. So we built Light Planner — and we’re giving it away for free.
What it does
Light Planner is a real point-by-point calculator, not a rule-of-thumb estimator:
- EN 12464-1 room targets — pick the space 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.
- 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 (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.
An honest tool
Light Planner is a planning estimate, not a certified photometric calculation — and it says so, clearly, throughout. It’s meant to get you to a confident, well-reasoned layout fast; for a stamped photometric report you’d still commission a formal study. Being upfront about that is part of what makes a tool trustworthy.
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 its honest limits. No sign-up, no PDF to hunt down.
It’s 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 will keep getting better — a lot of what’s already in it came from real feedback.
- Tried it and 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, or email [email protected] and we’ll price it (and help you source anything we don’t make ourselves).
Light Planner is a free tool from Light Solutions ApS, makers of HiluX professional LED lighting.