lamp (n.) Look up lamp at Dictionary.com
c.1200, from Old French lampe "lamp, lights" (12c.), from Latin lampas "a light, torch, flambeau," from Greek lampas "torch, lamp, beacon, meteor, light," from lampein "to shine," from nasalized form of PIE root *lap- "to shine" (cognates: Lithuanian lope "light," Old Irish lassar "flame"). Replaced Old English leohtfæt "light vessel." To smell of the lamp "be a product of laborious night study" is from 1570s.