The lamp shines until it's out. Don't go dark early.

The source

"The lamp shines until it's out. Don't go dark early." Marcus Aurelius said it in Meditations 12.15. Translated by George Long, 1862.

"Does the light of the lamp shine without losing its splendour until it is extinguished; and shall the truth which is in thee and justice and temperance be extinguished before thy death?"

George Long, 1862, Meditations 12.15.

Who said it

Marcus Aurelius (121–180 AD). Roman emperor who wrote private notes to himself on a military campaign. We know them as the Meditations.

Questions

Who said "The lamp shines until it's out. Don't go dark early."?

Marcus Aurelius (121–180 AD). Source: Meditations 12.15.

What is the original wording?

Does the light of the lamp shine without losing its splendour until it is extinguished; and shall the truth which is in thee and justice and temperance be extinguished before thy death? (George Long, 1862). Translated by George Long, 1862.