Light Block – Minecraft Wiki

Light blocks (in Bedrock Edition) or lights (in Java Edition) are invisible blocks, primarily intended for map makers, that can produce any light level from 0 to 15. The light block is also the only light-emitting block capable of producing light level 8. Light blocks cannot be mined, similar to air, and can be targeted only if the player is holding a Light item in the main hand. Light blocks with a light level of 0 are functionally identical to air. They do not attach to any block, meaning that

My old world in version 1.8.9 was corrupted and I solved the problem in a tutorial on the Minecraft wiki. So I decided to play with version 1.12.2. Everything was normal, but

Light Block – Minecraft Wiki

Blackstone – Minecraft Wiki

List of light-emitting blocks in Minecraft

Grass Block - Minecraft Wiki - Neoseeker

Light – Minecraft Wiki

Froglight Block

We have done this : r/PhoenixSC

The Redstone Circuit - Ref. by Minecraft Wiki - Maps - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum

Snow Block – Minecraft Wiki