“Yakādu zaytuhā yuḍīʾu”
Its oil almost gives light.
“Wa-law lam tamsashu nār”
Even though no fire had touched it.
In this Qur'anic imagery, “yakādu” conveys a remarkable degree of radiance through nearness rather than a bare assertion of independent ignition. “Law” contributes a hypothetical condition.
The rhetorical focus here is the effect of nearness and supposition, not an exhaustive interpretation of the verse's religious or exegetical meanings.