| The drop-off in illuminance from vertical glazing is a function with an exponential declining shape. |
| The amount of light falling on a surface is known as the illuminance and is measured in lumens per square meter or lux. |
| This is a basic and most important relation underlying all calculations of image illuminance. |
| As an alternative to a preselected profile, the illuminance can be regulated by a daylight sensor. |
| When a lux value is measured in a scene, it only represents the illuminance at the object in focus. |
| You can measure illuminance using a light meter located on the work surface where tasks are performed. |
