Minecraft: How to make Redstone Daylight Detector
(Read time is about 1 minutes)
3 Glass + 3 Nether Quartz + 3 Wood Slabs (Any type) --> Daylight Detector
Can be used to create "automatic" lighting with Redstone Lamps.
Can be used with machines that need to know if it's day-time or night-time.
Right Click on it to change from Daylight Detecting to Nightlight Detecting.