Ultrabright Lib
A library mod that extends Minecraft's light level system from the vanilla limit of 15 all the way up to 127.
Features
- Extended Light Levels — Push the maximum light level from 15 to 127, enabling ultra-bright light sources
- Easy Integration — Other mods simply register blocks with light emission values above 15, and Ultrabright Lib handles the extended lighting automatically
- Ultrabright Torch — A creative-only test torch with a light level of 30, included to demonstrate the library's capabilities
How It Works
Ultrabright Lib patches the vanilla light engine at the bit level, widening the internal storage from 4-bit to 8-bit. Extended light data is persisted to chunks and synchronized to clients seamlessly.
Compatibility
Works with any NeoForge mod that registers blocks with light emission values above 15. No configuration required — simply install and enjoy.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as ultrabrightlib-1.0.0.jar — drop this file into the mods folder
- Download size: 39 KB
- Download link checked 24 Aug 2026 — working
These come from our own check of the pack file, not from the source page.