[noun] + に照らして [noun] + に照らすと [noun] + に照らせば [noun] + に照らし
に照らして means "in light of", "judged by": you hold something up against a standard and draw a conclusion. It goes after a noun for the standard – a law, a rule, the facts, past experience. It comes from てらす照らす, "to shine a light on".
The second half is a judgement: legal or not, right or wrong, likely or not.
The conditional forms mean the same and lean a little more on "if you judge by it". に照らせば is the most formal of the three.
In writing, にてらし照らし ends a clause the same way に照らして does.
に照らして belongs to legal texts, reports, news and formal speeches. In conversation, からかんがえる考えると or からみる見ると says the same thing.