In Tibetan Buddhism there is a "dark retreat" where you spend the retreat time in total darkness [1]. Retreat times are generally 49 days iirc. A teacher I've

In Tibetan Buddhism there is a "dark retreat" where you spend the retreat time in total darkness [1]. Retreat times are generally 49 days iirc. A teacher I've done some practice with has guided some intro sessions for dark retreats and is planning on offering them at a retreat center in New York -- actually, it looks like he posted today about one coming up in NYC for those that are around: https://www.instagram.com/repadorje/p/C34rCaKOA3B/ https://www.instagram.com/repadorje/p/C34rCaKOA3B/ [1] https://en.wikipedia.org/wiki/Dark_retreat https://en.wikipedia.org/wiki/Dark_retreat