Light

Light increases the world's visibility, though Monsters are not visibly affected by it or its absense.

A large amount of items produce light, including Static Light Sources, Lava, Unique Swords (such as the Fiery Greatsword), the Orb of Light, Fallen Stars, Torch embers, and others still. At day any uncovered sky tile will also give off light. Click here for detailed light source information.

The amount of light tiles have lessen as they get further away from a light source, light will lessen more as it goes though solid blocks compared with air.