Latin translation: "In the absence of light darkness prevails"

A friend has asked me for a translation into Latin of the sentence, “In the absence of light darkness prevails.” I responded,

I am not certain of my translation here. If anyone has a critique or a better idea, I would enjoy hearing it. Thanks.

May I respectfully suggest ProZ?

This is a site where hundreds of pro and semi-pro translators hang out, hoping that a paying job will come along. In the meantime, they’re happy to provide answers to short translation questions…for free.

You might get several opinions…but you choose the one you like.