.

Consequently, do daylight sensors work underground?

No, daylight sensors will not detect light inside a house, in fact, they don't detect just any light, they only detect daylight. If a daylight sensor has an opaque block above it (such as the roof of your house), then it will emit a weaker signal, or none at all, as it is directly proportional to the sky light.

One may also ask, how does a daylight detector work? A Daylight Sensor is a solar powered slab-like block that is activated only by sunlight. It detects daylight in the sky and outputs a redstone signal that corresponds to the sunlight of which the sun is positioned. When the sun reaches its maximum daylight (at noon), it can activate up to 15 redstone activated blocks.

how do you change a daylight sensor in Minecraft?

In Minecraft 1.7 and below, daylight sensors cannot be inverted to turn on at night. Instead, send a redstone dust line to a redstone torch to invert the signal, then place the lamp on the other side of the torch.

How do you reverse a daylight sensor?

A daylight detector can be "inverted", which reverses the power levels produced by the daylight detector. To invert a daylight detector, aim at the placed daylight detector and use the "Use Item/Place Block" control.