Lighting calculator
Choose the room, enter its size and the ceiling height — we work out how many fittings it needs and how to lay them out, and pick them from stock. Reflectances, work plane and factors are under “For specialists”.
It is in the product specs. Not sure? Leave it — this is a typical fitting for this kind of room.
For specialistsTarget, work plane, suspension, reflectances, maintenance factor, light colour and spacing limit
Empty — the room's target, 200 lx. Scale: 50, 75, 100, 150, 200, 300, 500, 750, 1000
The height the light is counted at: a desk, a bench or the floor
0 for recessed or surface fittings; for a pendant, the length of its drop
The buttons set all three at once; below, each on its own.
How much light is left at the end of the maintenance cycle: dirt and LED ageing.
The fittings below are ranked by it; when none are in stock, the nearest are shown
Spacing ÷ height above the work plane. 1.5 for a typical direct fitting; the datasheet has the exact figure
Fixtures needed
8
1,000 lm each
- Illuminance: delivered / target
- 246 / 200 lx
- Layout: along length × width
- 4 × 2
- Spacing between fittings
- 1.25 × 2 m
- Walls to the outer fittings
- 0.63 × 1 m
- Light colour
- 4,000 K · neutral
- Minimum by calculation, pcs
- 7
A design estimate by the lumen method for a typical direct fitting; the exact calculation for a specific fitting is done in DIALux. Spacing and wall distances are for an even grid.
Floor-by-floor project and quote request
Work through the rooms and add each one to a floor. The total at the bottom is what the whole job needs.
Nothing yet. Add the room to a floor — or send us just this calculation.
Have a floor plan?
Upload a DWG, a scan or a photo of the plan and place these fittings on it at real size.
Need sockets and switches too?
Answer a few questions for each room and get an exact list of sockets and switches, ready to add to the cart.