What does Matthew 5:15 mean?

Matthew 5:15 KJV
Neither do men light a candle, and put it under a bushel, but on a candlestick; and it giveth light unto all that are in the house.

Matthew 5:15 NKJV
“Nor do they light a lamp and put it under a basket, but on a lampstand, and it gives light to all [who are] in the house.

Matthew 5:15 MKJV
Nor do men light a lamp and put it under the grain-measure, but on a lampstand. And it gives light to all who are in the house.

Matthew 5:15 KJV 2000
Neither do men light a lamp, and put it under a bushel, but on a lamp stand; and it gives light unto all that are in the house.

Interlinear KJV

Neither /oude/ do men light /kaio/ a candle, /luchnos/ and /kai/ put /tithemi/ it /autos/ under /hupo/ a bushel, /modios/ but /alla/ on /epi/ a candlestick; /luchnia/ and /kai/ it giveth light /lampo/ unto all /pas/ that are in /en/ the house. /oikia/ {a bushel: the word in the original signifieth a measure containing about a pint less than a peck}

Albert Barnes’ Commentary

Verse 15. Neither do men light a candle, etc. Jesus proceeded here to show them that the very reason why they were enlightened was, that others might also see the light, and be benefited by it. When men light a candle, they do not conceal the light, but place it where it may be of use. So it is with religion. It is given that we may benefit others. It is not to be concealed, but suffered to show itself, and to shed light on a surrounding wicked world.

A bushel. Greek, a measure containing nearly a peck. It denotes anything, here, that might conceal the light.

{1} “bushel” or, “The word, in the original, signifieth a measuring containing about a pint less than a peck.”