Sea Lantern (Dazzle)

The Sea Lantern is a set of blocks added by Dazzle. When powered by a redstone signal, it emits light at value 15. They can be inverted by using a Redstone Torch on the block, which will cause it to emit light at value 15 unless powered by a redstone signal.

They break instantly regardless of the tool used to break them.

They are stylistically similar to vanilla Minecraft's Sea Lanterns.