File Name- Fullbright-mod-fabric-1.21.4.jar ~upd~ -

Once you are in-game, you have two ways to activate Fullbright:

But as he began to mine, he noticed something strange. Without the shadows, the monsters had nowhere to hide, yet they seemed more visible than ever. A Creeper stood in a corner that should have been pitch black, its pixelated eyes fixed directly on him. It didn’t hiss. It didn’t move. It just watched. File name- Fullbright-Mod-Fabric-1.21.4.jar

The "Fullbright" mod is a utility that allows you to see clearly in total darkness as if you had a permanent Night Vision effect. Once you are in-game, you have two ways