Daylight Factor Examples Table
Example daylight-factor table that pairs indoor task-plane readings with same-day outdoor reference readings.
Table PDFDaylight Factor Examples Table
Download the table with the page URL and retrieval date for offline lighting checks.
| Example condition | Indoor and outdoor readings | Daylight factor example | Measurement note |
|---|---|---|---|
| Overcast room centre | Indoor 120 lx, outdoor 2,000 lx | 6% | Useful only when the indoor and outdoor readings were taken close together under the same sky condition. |
| Window-side desk | Indoor 450 lx, outdoor 15,000 lx | 3% | Note the task-plane position because a window-side value may not describe the deeper room. |
| Deep room point | Indoor 75 lx, outdoor 10,000 lx | 0.75% | Name the distance from the window so the low result is not compared with a perimeter reading. |
| Skylight zone | Indoor 300 lx, outdoor 12,000 lx | 2.5% | Note whether direct sun was excluded, because a sun patch can overstate the repeatable daylight condition. |
| Shaded kitchen bench | Indoor 180 lx, outdoor 8,000 lx | 2.25% | Keep electric lighting state, blind position and surface height in the same note. |
| Late afternoon check | Indoor 60 lx, outdoor 1,500 lx | 4% | Treat time of day as part of the condition rather than as an all-day daylight result. |