Joseph the Carpenter, Georges de La Tour; oil on canvas; roughly 54 x 40 in (137 x 101 cm) Link is to image page on Wikimedia Commons. Original is listed as being in the Louvre (though I can’t find it in a search of the Louvre’s online database).
17th century French painter Georges de La Tour was known for his scenes lit by candlelight, the source for which was sometimes open, and sometimes obscured by a hand or other object, as in this painting.
Given his overall tendency for naturalistic rendering and lighting, and the way he has presented candle flames in other paintings, I find his representation of the candle flame in this painting particularly odd. Perhaps, given that the candle is held by a young Jesus, it as some religious significance. I don’t know.