Daylight Detector

A daylight sensor is a block that outputs a redstone signal based on sunlight.

Usage
A daylight sensor can be used as a redstone power source and as fuel for a furnace.

A daylight sensor is 0.375 blocks high (3/8ths of a block).

As a fuel
A daylight sensor can be used as fuel in a furnace. Each daylight sensor lasts 15 seconds, or 1.5 operations.

As a redstone component
A daylight sensor produces redstone power with a signal strength proportional to its exposure to the sun and the time of day (see tables below). Sources of block light (torches, glowstone, etc.) cannot activate a daylight sensor.

An active daylight sensor will power adjacent redstone dust (including below it) and adjacent redstone repeaters and redstone comparators facing away from it, and will activate adjacent redstone mechanisms (including above and below) such as pistons, redstone lamps, etc. It has no effect on other adjacent blocks (for example, it cannot power a block the way a repeater can).

Daylight detector
If a daylight sensor has an opaque block above it, then it will emit a weaker signal, or none at all, as it is directly proportional to the sky light.

Night time detector
If a daylight sensor is completely cut off from the sky (its block is at sky light 0), either because it is encased in opaque blocks or because it is too far from sky exposure, then its signal pattern changes: it produces power at night instead of the day, and weather is irrelevant to the signal strength.

Inverted daylight detector
Right-clicking the daylight sensor will invert it. The inverted sensor acts contrary to the daylight sensor emitting full redstone strength during night time, weak strength during the day and no redstone strength at high noon.

Trivia

 * While other blocks use a block entity to store additional data, the daylight sensor only uses its block entity to force it to regularly update its output signal strength.
 * The inverted form of the daylight sensor cannot be obtained as an item.

Gallery
Tageslichtsensor Sensor de luz solar Capteur de lumière du jour Daglichtsensor Detektor światła dziennego Датчик дневного света 阳光传感器