Underwater Torch

Underwater torches are non-solid blocks that emit light underwater.

Obtaining
An underwater torch will break instantly and drop itself when broken using anything. The tool will not take any damage when breaking the underwater torch.

Underwater torches will also be broken if pushed by a piston.

Usage
Underwater torches can be placed on the top or the sides of most solid blocks, although some will require (see placement for exceptions). Being non-solid, underwater torches have no collision box.

Gravity affected blocks like sand and gravel will not fall if the block below them has an underwater torch on it, and will break if they fall onto an underwater torch.

Light
Underwater torches give off a light level of 14. Underwater torches also melt snow layers and ice within 2 blocks (taxicab distance).

Placement
In general, underwater torches can only be placed on solid, opaque, full blocks; exceptions are listed below.