Ps. cxli. was called ὁ ἐπιλύχνιος ψαλμός (Ap. Const. viii. 35).  In the Vespers of the Eastern Church an evening hymn is sung, translated in D.C.A. i. 634, “Joyful Light of the holy glory of the immortal Father, the heavenly, the holy, the blessed Jesus Christ, we having come to the setting of the sun and beholding the evening light, praise God, Father, Son, and Holy Ghost.  It is meet at all times that thou shouldest be hymned with auspicious voices, Son of God, Giver of Life:  wherefore the world glorifieth thee.”