In Terraria, light pets are a special type of pet that emit light, aiding players in dark areas or while caving. These pets are summoned using specific items and once summoned, they follow the player around indefinitely, even in liquids, without costing any mana. They are infinitely reusable and have their own dedicated inventory slot in the player's equipment section. Some light pets can even be controlled by the player. However, while it's possible to change the color of the light pet itself using dyes, the color of the light they produce will always remain the same.