Wisp Fountain

Attracts wisps. They mostly come at night... mostly.
Overview
The Wisp fountain is a craftable decorative building that attracts wisps in low-light conditions. It is used as a source of wisps for the 
A new wisp joins the fountain every 30 seconds, with up to three wisps typically present at first. As the night goes on, the number can eventually rise higher, with reports of up to nine wisps appearing near morning. Once the fountain has three wisps, the status changes from “The wisps are coming.” to “The wisps are dancing.” This usually indicates that the fountain has reached its normal cap, although more can appear in unusual cases.
Wisps begin to appear around 18:00 and also spawn when it is raining. They will fly away and disappear once daylight returns if they are not caught in time. During the day, the fountain instead shows that the wisps demand darkness. In practice, this means that wisp farming is tied to keeping the area dark enough for long enough for the wisps to accumulate.
- If multiple
Wisp fountains are built nearby, they share the same maximum wisp pool.
- To let each fountain reach its own maximum, place them more than 20 meters apart.
- Wisps can still appear during daytime if rain or storm effects create sufficiently dark conditions.
- Weather effects from some boss encounters can temporarily allow wisps to spawn outside normal nighttime conditions, as long as the player stays within the affected area.
- Because wisps despawn when the light returns, staying near the source of the darkness is important.
- Low-light biomes such as the
Swamp can also support wisp spawning, provided the area remains loaded.
The recipe for the Wisp fountain uses 

Official description
Attracts wisps. They mostly come at night... mostly.
References to this (2)
Other entities of this type
- Adze
- Artisan Table
- Barber Station
- Beehive
- Black Forge
- Black Forge Cooler
- Blast Furnace
- Butcher's Table
- Cauldron
- Charcoal Kiln
- Chopping Block
- Cooking Station
- Eitr Refinery
- Feathery Wreath
- Fermenter
- Food Preparation Table
- Forge
- Forge Bellows
- Forge Cooler
- Forge Tool Rack
- Galdr Table
- Gem Cutter
- Grinding Wheel
- Iron Cooking Station
- Mead Ketill
- Metal Cutter
- Obliterator
- Pots and Pans
- Rune Table
- Sap Extractor
... +13 (see sidebar for full list)