In Eastern Orthodox Christian theology, the Tabor Light (Ancient Greek: Φῶς τοῦ Θαβώρ "Light of Tabor", or Ἄκτιστον Φῶς "Uncreated Light", Θεῖον Φῶς "Divine Light"; Russian: Фаворский свет "Taboric Light"; Georgian: თაბორის ნათება) is the light revealed on Mount Tabor at the Transfiguration of Jesus, identified with the light seen by Paul at his conversion.

As a theological doctrine, the uncreated nature of the Light of Tabor was formulated in the 14th century by Gregory Palamas, an Athonite monk, defending the mystical practices of Hesychasm against accusations of heresy by Barlaam of Calabria. When considered as a theological doctrine, this view is known as Palamism after Palamas.

The view was very controversial when it was first proposed, sparking the Hesychast controversy, and the Palamist faction prevailed only after the military victory of John VI Kantakouzenos in the Byzantine civil war of 1341–1347. Since 1347, it has been the official doctrine in Eastern Orthodoxy, while it remains without explicit affirmation or denial by the Roman Catholic Church. Roman Catholic theologians have rejected it in the past, but the Catholic view has tended be more favourable since the later 20th century. Several Western scholars have presented Palamism as compatible with Catholic doctrine. In particular, Pope John Paul II in 1996 spoke favourably of hesychast spirituality, and in 2002 he named the Transfiguration as the fourth Luminous Mystery of the Holy Rosary.