Daylight Detector

'Daylight Detectors are blocks will be implemented in 1.5 "Redstone Update". The block was announced at Minecon 2012. Jeb said that the blocks would send a redstone signal with a strength depending on the amount of daylight available. It won't generate an output at night.

History
Tageslichtdetektor Détecteur de lumière du jour Датчик света 阳光探测器