Easton's Bible Dictionary

Lamp

• (1.) That part of the candle-sticks of the tabernacle and the temple which bore the light (Ex. 25:37; 1 Kings 7:49; 2 Chr. 4:20; 13:11; Zech. 4:2). Their form is not described. Olive oil was generally burned in them (Ex. 27:20).
• (2.) A torch carried by the soliders of Gideon (Judg. 7:16, 20). (R.V., "torches.")
• (3.) Domestic lamps (A.V., "candles") were in common use among the Hebrews (Matt. 5:15; Mark 4:21, etc.).
• (4.) Lamps or torches were used in connection with marriage ceremonies (Matt. 25:1).

This word is also frequently metaphorically used to denote life, welfare, guidance, etc. (2 Sam. 21:17; Ps. 119:105; Prov. 6:23; 13:9).