# `brightness`

The screen backlight: read from `/sys/class/backlight` (watched, so a
brightness key shows at once) and set through logind's
`SetBrightness` (no root or udev rules).

| Field | Type | |
| --- | --- | --- |
| `level` | `float rw` | Backlight level, 0 to 1. Writable. |
| `available` | `bool` | A backlight was found. |