The Eucharist will be promptly exposed at 7:00 p.m. and promptly reposed at 7:30 p.m. You don't have to stay the full 30 minutes. You can come and go as you please. The church lights will not be on, so I don't recommend bringing anything to read. This is a time gaze upon our Lord (Contemplation) in prayer and meditate on His True and Real Presence in the Eucharist.