1 Answer. The daylight sensor can theoretically generate a signal while underneath any sort of block. This is because it generates a signal that is proportional to the amount of sunlight it is exposed to (on any side, including underneath).

Do daylight sensors work underwater?

Trivia. Daylight Sensors cannot be activated through artificial light sources (like Torches). When underwater, Daylight Sensors create Airlocks. Since the signal is directly proportional to the sunlight (or inversely in 'Inverse Mode'), if an opaque block is placed above it, it will not function.

Does a daylight sensor work inside?

1 Answer. No, daylight sensors will not detect light inside a house, in fact, they don't detect just any light, they only detect daylight. This means you cant place a bunch of torches around the sensor and expect it to output a signal.