"Tonight is the Wednesday night of Holy Week. In the Anglican world, this often means it is time for Tenebrae (a Latin word meaning “shadows” or “darkness”).
Tenebrae is a traditional service that comes from the Benedictine monasteries of Europe. It is a time of experiencing the last week in Christ’s life through psalms, lessons, prayers, and gathering darkness. The centerpiece of the service is a gathering of fifteen candles which are snuffed out, one by one, as the service goes on. This increases the physical darkness, while also symbolizing Jesus’ life ebbing away.