Lumens per Square Metre Table
Formula-derived relationship between lux targets, area and lumen allowance per square metre.
89 lm/m2 planning allowance
179 lm/m2 planning allowance
268 lm/m2 planning allowance
357 lm/m2 planning allowance
536 lm/m2 planning allowance
893 lm/m2 planning allowance
1,339 lm/m2 planning allowance
Table PDFLumens per Square Metre Table
Download the table with the page URL and retrieval date for offline lighting checks.
| Target illuminance | Direct relationship | With UF 0.70 and MF 0.80 | Planning use |
|---|---|---|---|
| 50 lx | 50 lm/m2 before delivery factors. | 89 lm/m2 planning allowance. | Low circulation or background estimate where the assessed plane is not a work surface. |
| 100 lx | 100 lm/m2 before delivery factors. | 179 lm/m2 planning allowance. | Low ambient or circulation estimate. |
| 150 lx | 150 lm/m2 before delivery factors. | 268 lm/m2 planning allowance. | General background estimate for relaxed rooms. |
| 200 lx | 200 lm/m2 before delivery factors. | 357 lm/m2 planning allowance. | Brighter ambient estimate for multipurpose rooms. |
| 300 lx | 300 lm/m2 before delivery factors. | 536 lm/m2 planning allowance. | Common task-plane estimate for kitchens, desks and work areas. |
| 500 lx | 500 lm/m2 before delivery factors. | 893 lm/m2 planning allowance. | Higher task estimate; check standards context for workplaces. |
| 750 lx | 750 lm/m2 before delivery factors. | 1,339 lm/m2 planning allowance. | Detailed-task sensitivity check; verify the task and standards context before relying on it. |