Light Block

Light blocks are invisible blocks, primarily intended for map makers, that can produce any light level.

Obtaining
Light blocks cannot be mined or targeted, similar to air. Light blocks with a light level of 0 are functionally identical to air. They do not attach to any block, meaning that breaking an adjacent block does not remove the light block. However, they can be broken by replacing them with another block. The exception is water (including, $$, flowing water) which can occupy the same space as a light block. See Waterlogging for more information.

Light blocks are not in the player's Creative inventory. They can only be obtained using commands such as. $$, specifying the data value from 0 to 15 determines the block's light level; if the data value is not specified, the light block emits a light level of 0. $$, using can give a light block with a specific light level; if the block state is not specified, the light block emits a light level of 15.

Usage
A light block is normally used in adventure maps (while most just apply Night Vision or Conduit Power effects). This is also used by teachers to light up assignments.

Each light block (as a block or as an item) has an associated light level, which can be anything from 0 to 15. In the player's inventory, light blocks display their light level in the top-left corner and appear "brighter" at higher light levels.

In Bedrock Edition, when placed as blocks, light blocks are non-solid and completely invisible. Unlike barriers and structure void, they do not reappear when the player is holding another light block.

Light blocks can be pushed and pulled by pistons, are detected by observers, and can be waterlogged.

Light source
Light blocks produce their associated light level.

ID




Metadata
Each light block has a data value from 0 to 15, which determines its light level.

Trivia

 * Light Blocks are the only item in vanilla Minecraft to have an HD (32x32 instead of 16x16) texture.