Below is a breakdown of how light levels function in version 1.17.1. 1. The Core Mechanics Light in Minecraft is measured on a scale from .
: Light level decreases by 1 for every block of distance from the source along the X, Y, or Z axes. Diagonally, it decreases by 2. 2. Mob Spawning Rules (1.17.1)
: To prevent mobs from spawning, you must keep all walkable surfaces at a light level of 8 or higher . Light Levels 1.17.1
: Maximum brightness (direct sunlight or standing on a Glowstone block). Level 0 : Absolute darkness.
: Glowstone, Sea Lanterns, Lanterns, Jack o'Lanterns, Beacons, and Conduits. Level 14 : Torches and End Rods. Level 10 : Soul Fire Torches and Soul Lanterns. Below is a breakdown of how light levels
: Glow Lichen (introduced in 1.17), which is often not bright enough on its own to stop mob spawns. 4. Technical Tools
In Minecraft version 1.17.1, light levels follow the "Legacy" rules used for most of the game's history. It is important to note that the major overhaul where hostile mobs only spawn at light level 0 did occur until the 1.18 update. : Light level decreases by 1 for every
: Since a Torch emits light level 14, you generally need to place them every 6 to 7 blocks on a flat surface to ensure no spot drops to level 7 or below. 3. Light Sources in 1.17.1 Common light-emitting blocks available in this version: