Examples
Examples
Try the starting example
- Area (m²)
- 100
- Target illuminance (lux)
- 300
- Lumens per luminaire (lm)
- 4000
- Utilization factor
- 0.6
- Maintenance factor
- 0.8
- Luminaires rounded up (count)
- 16
- Calculated average illuminance (lux)
- 307.2
Try another scenario
- Area (m²)
- 101
- Target illuminance (lux)
- 300
- Lumens per luminaire (lm)
- 4000
- Utilization factor
- 0.6
- Maintenance factor
- 0.8
- Luminaires rounded up (count)
- 16
- Calculated average illuminance (lux)
- 304.158416
Calculation method
Calculation method
Luminaires rounded up (count)
Lumen method N=ceil(area×target/(lumens×utilization×maintenance)); no uniformity/glare or layout calculation.
Calculated average illuminance (lux)
Lumen method N=ceil(area×target/(lumens×utilization×maintenance)); no uniformity/glare or layout calculation.
Symbols and units
- a
- Area (m²)
- b
- Target illuminance (lux)
- c
- Lumens per luminaire (lm)
- d
- Utilization factor
- e
- Maintenance factor
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- User-supplied measurements and assumptions; Lumen method N=ceil(area×target/(lumens×utilization×maintenance)); no uniformity/glare or layout calculation. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.