Calculate the light
before buying fixtures.

Estimate fixture count, illuminance, spacing and annual energy cost. Everything runs locally — no account and no data upload.

Results are planning estimates. A qualified electrician or lighting professional should verify installation and safety requirements.

The full workflow in one place

From a quick estimate to a ceiling layout and comparison of fixture sets.

Calculates fixture count, illuminance, power and energy cost.

Creates an editable fixture grid and exports an SVG plan.

Compares up to six saved variants by cost, power and lux.

150 lx · editable starting point

300 lx · editable starting point

100 lx · editable starting point

200 lx · editable starting point

500 lx · editable starting point

200 lx · editable starting point