Minecraft wiki entry for Honey_farming, associated text: Redstone comparators output a redstone signal from a beehive based on the honey level of the hive. Every time a bee exits the hive after having worked with the pollen it has collected, the honey level increases by 1. Each honey level increases the redstone output from a redstone comparator by 1, to a maximum of 5, which is when the hive changes in appearance and indicates it is ready for harvest. By using this mechanic, you can set up a system with the output signal to activate a dispenser as soon as the hive is full. The two designs shown are both tileable; the longer and more expensive one puts the hive on top, and allows a filtering hopper to be placed below..