λυχνίαν, (luchnian) in Matthew 5:15: Noun Accusative Singular Feminine

Noun: the form names a person, place, thing, or concept in the clause.

Accusative: marks the noun sentence role as the context requires.

Singular: the number should be read from this occurrence, not generalized beyond the clause.

Feminine: grammatical gender marks form agreement and does not by itself make a theological claim.

Put it

The positive placement phrase in Matthew 5:15

Names the proper place where the lit lamp is set.

Do not make the lampstand image carry more than the illustration states.

Medium: lampstand image

Accusative lampstand noun. names where the lamp is placed. Attached to put it. Governed by the positive placement phrase in Matthew 5:15. Read with but on a lampstand.

Where is the lamp placed instead? It is placed on a lampstand.

Direct: The noun directly supports lampstand.

This occurrence must be read within Matthew 5:15, not as a standalone word study.

The witness reads λυχνίαν, in Matthew 5:15.

The lemma names a lampstand, and here it supplies the proper visible place for the lamp.

The noun stands after the contrast but, marking where the lamp belongs.

Jesus contrasts hiding a lamp with placing it where it gives light.

The form supports the public visibility point of the salt and light sayings.

Use it to explain the positive placement that lets the lamp serve its purpose.

Do not build an institutional allegory from the lampstand noun alone.