(noun) A device that generates heat, light or other radiation. Especially an electric light bulb.
"If you light a lamp for somebody, it will also brighten your path."
"Be a lamp unto yourself. Work out your liberation with diligence."
"Be a lamp, or a lifeboat, or a ladder. Help someone's soul heal. Walk out of your house like a shepherd."
"To keep a lamp burning, we have to keep putting oil in it."