“Is a lamp brought in to be put under a basket?”
Does anyone bring in a lamp to put it under a basket or under a bed? Doesn't he set it on a stand? (Mark 4:21 BSB)
What it sounds like today
Two generic images about visibility.
The cultural key
Hilltop limestone towns of Galilee gleamed pale in the sun, visible for miles; hearers could likely see one from where they sat. The lamp scene assumes a one-room peasant house: a single clay oil lamp on a stand lit the entire family. Covering it with the modios (a grain-measuring basket) would smother it, a deliberately absurd act. Behind both stands Israel's calling to be a light to the nations (Isaiah 42:6). Mark phrases it as a question and adds the bed; his Greek says literally that the lamp 'comes,' phrasing many readers hear as a wink: the Light has come in, and is not meant to be hidden.
Recovered meaning
Being visible isn't optional for a disciple any more than a hilltop town can hide. Lighting a lamp and then smothering it defeats the whole point of lighting it.