When the progress bar is full the potion of night vision will now be a potion of invisibility. They are extremely useful for all kinds of situations but as they put all potions on a 10 minute cooldown its best to only use these in an emergency.
If you want to increase the duration of the invisibility effect add a redstone to your potion of invisibility.
How to make invisibility potion recipe. Then add the fermented spider eye to the top box. Add the fermented spider eye to the top box in the brewing menu. Can be purchased from arcadia.
A recipe to create an invisibility potion. I keep invisibility potions on all my alts take off running pop a potion then run in the opposite direction usually works. To make a potion of invisibility 3 00 you will need 1 potion of night vision 3 00 and 1 fermented spider eye.
Place the potion of night vision 3 00 in one of the bottom boxes in the brewing stand menu. Invisibility potions are the best anti gank strategy in the game. Table at honeyside a recipe to create an invisibility potion.