LightLevelOverlay
Shows light levels on blocks. That is it. That is the mod.
Features
- Numbers on blocks so you can see exactly where mobs can spawn
- Color coded: Red (0), Yellow (1-7), Green (8+)
- Renders above foliage so you do not have to squint through grass
- Hides behind walls and only shows what you can actually see
- Fast, cached and optimized so it will not tank your FPS
- Underwater mode for drowned spawn prevention
Platforms
Works on both Fabric and NeoForge.
Controls
| Key | Action |
|---|---|
| F9 | Toggle overlay |
| F10 | Open config |
Config
Press F10 or edit config/lightleveloverlay-client.json
- Range: How far to scan (horizontal/vertical)
- Update Interval: Cache refresh rate in ms
- Colors: Customize the RGB values
- Show Only Spawnable: Hide safe blocks, show only danger zones
- Text Scale: Make numbers bigger or smaller
- Underwater Mode: Show light levels in water
Installation
- Install Fabric or NeoForge for Minecraft 1.21.1
- Install Architectury API for your loader
- Install Cloth Config for your loader
- Drop the jar in your mods folder
- Done
Dependencies
- Architectury API (required)
- Cloth Config (required)
- Fabric API (required for Fabric only)
Credits
Inspired by Light Level 2025 by dark-lion-jp. This is a standalone implementation, not a port, not affiliated. Bug reports go here, not there.
License
MIT
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.3
- 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 lightleveloverlay-fabric-1.3.0+mc1.21.3.jar — drop this file into the mods folder
- Download size: 37 KB
- Download link checked 30 Aug 2026 — working
These come from our own check of the pack file, not from the source page.