[L furrows his brow. He doesn't doubt that he's had more experience than Light with knocking back potions for various reasons, so he does have some context.]

There are factors... dosage, body mass, potency of the ingredients. They can all affect how quickly a potion works. If you intended to make it weaker, it wouldn't be instantaneous.

[A pause, after a few more moments.]

That being said... you might have erred on the side of too diluted, especially considering my tolerance is probably higher than yours.