I think you’re giving Genesis more credit than it deserves. It doesn’t say God used light to create anything. In most translations, it just says God created the Heavens and the Earth without specifying how. It says at first the Earth was dark and formless, until God commanded light to exist, creating day and night and evening and morning.
I’d be much more impressed if Genesis told us that the entire universe was compacted into a hot dense state ~14 billion years ago, and that during its earliest moments it passed through a decoupling of the four fundamental forces, then went through a brief moment of incredibly rapid expansion, etc. etc. … but it doesn’t. Instead it incorrectly states that the Earth predates the stars, that day and night predate the Sun, that life on land predates life in the seas, and more. If a divine entity was capable of relating the origin of the universe and life on Earth to an ancient author, there’s no reason it couldn’t do so in a way that’s unambiguous to modern scientifically-literate readers.
I think it’s far more likely there’s no connection at all, and people only see one there because they specifically went and tried their hardest to find one, no matter how tenuous.
Sounds like you’re remembering the Bussard Ramjet, which sucks up hydrogen from the interstellar medium to fuel a fusion reactor. It’s technically possible on paper, but not even close to practical for a variety of reasons, among those being that the density of the interstellar medium is too low to provide enough fuel and fusion reactors aren’t efficient enough.