The Portal Beam light sensor measures the intensity (brightness) of indoor ambient light. Light intensity is represented in the form of a percentage ranging from 0 (dark) to 100 (bright).
| Percentage | Light intensity |
|---|---|
| 0 - 10 | Total darkness to very dark |
| 10 to 30 | Slightly dark to low light |
| 30 to 50 | Cloudy to shaded daylight |
| 50 to 80 | Average to full daylight |
| 80 to 100 | Very bright daylight; direct sunlight |