
In Space, the Water Candle's effects are much more prominent, increasing the effective spawn rate from +33% to +167%.Water Candles cannot be used to increase the spawn rates of certain events like the Pumpkin and Frost Moons, or the Goblin and Pirate Invasions, though the increase in spawned enemies still applies to the Blood Moon and Solar Eclipse.However, it will increase enemy spawn rates underwater, whether placed or held. It will give off light underwater if placed, but not if held. The Water Candle can be placed underwater, but it cannot be held underwater.On the Mobile version, the effect of a placed Water Candle will stack with that of a held Water Candle.Conversely, the Water Candle's effect stacks with that of the Battle Potion. If a Peace Candle and a Water Candle are active at the same time, neither have any effect on spawn rates. The Water Candle's effect is the opposite of the Peace Candle, which decreases enemy spawn rates. Water Candles cannot be turned off, and do not act as mechanisms. Water Candles that are turned off will not activate the Water Candle debuff. Placed Water Candles can be shut off by pressing the ⚷ Open / Activate button on them, and will toggle when activated via wiring. Water Candles can only be placed on platforms and flat furniture items like Work Benches and Tables. Multiple candles will not stack with each other, even if one is placed and the other held. In order to be considered "holding" the candle, it must be in the player's hotbar and currently selected merely being in a player's inventory will not suffice. The debuff is applied to any players holding or standing within a rectangular area of 169×125 ( ) / 100×84 ( ) tiles centered on a Water Candle.

The Water Candle debuff increases all enemy and critter spawn rates by 33%, and increases the maximum number of simultaneous on-screen enemies by 50%.

They can also be crafted at a Crystal Ball, which is bought from the Wizard. Several Water Candles are found commonly on the shelves of the Dungeon. Holding a Water Candle does not cause the debuff icon to display, but still causes an identical effect. When placed, it gives nearby players the Water Candle debuff. The Water Candle is a furniture item that can be placed or held to increase enemy and critter spawn rates in the area, and emits a low amount of light. For a complete list of candles, see Candle.
