They look like poor/pet quality Light Brahmas to me. Dark Brahmas start out looking like a gold laced chick. Mine from a hatchery were very dark, just like that, when they were chicks. When their feathers first came through, they still were convincing me they were dark brahmas or something else - But behold, they were Light Brahmas in the end. I think the reason why they stay so dark for their first few months is because of all the black leakage and pencilling on them in the future.
Real, Show Quality Light Brahmas, yes, should be very light and have almost no black - But almost every hatchery LB I've seen is dark like that with a yellow face, and even matures for a little while with dark feathers. And they all grow up to explain their dark feathers by having a lot of unnecessary black on their backs, hackles, and shoulders.
So, to be the only one here to say it - Yes. They are Light Brahmas. Just poor quality.