Matthew Poole and continuators on Judges 7:16

16 And he divided the three hundred men into three companies , and he put a trumpet in every mans hand with empty pitchers, and lamps within the pitchers .

To make a shew of a vast Army encompassing them.

Or, Torches made of such materials as would quickly take Fire, and keep it for some time.

Partly to preserve the Flame from the violence of Wind and Weather; and partly to conceal it, and surprise their Enemy with sudden and unexpected Flashes of Light.

Marginal references: Heb. trumpets in the hand of all of them.; Or, firebrands, or torches.