diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/ServerConfig.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/ServerConfig.kt
index 9e03be4bf..bd4045586 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/ServerConfig.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/ServerConfig.kt
@@ -84,7 +84,7 @@ object ServerConfig {
 		specBuilder.comment("Serverside config, holds shared values that are required to be read by both client and server.").push("server")
 	}
 
-	val LABORATORY_LAMP_LIGHT_LENGTH: Int by specBuilder.comment("In blocks").defineInRange("laboratoryLampLightLength", 3, 1, 128)
+	val LABORATORY_LAMP_LIGHT_LENGTH: Int by specBuilder.comment("In blocks").defineInRange("laboratoryLampLightLength", 6, 1, 128)
 
 	init {
 		specBuilder.comment("Energy batteries balance values").push("energyBatteries")