Introduced in Minecraft 1.17, light blocks are invisible items that produce light levels ranging from zero to 15.

Froglights are new decorative light blocks that will be released in the Minecraft 1.19 update. This is a brilliant addition to the variety of light blocks that are present in the game.

Minecraft 1.19 is slated to release pretty soon, and here is How to Get Frog Light in Minecraft of different colors.

You can only get light blocks via the /give command so, er, don't expect to go mining for light. (If you need more details on Minecraft console commands, you can follow that link.) ...

Minecraft Java Edition players can use the new snapshot update to get a brand new block type that gives even more control to creators.