Blu-Ray on DVD media

I'm on a Mac, looking to put a short FCP movie on blu-ray for the first time. I do not yet have Encore, but have access to it if what I want to do will work. The movie is only ~10 min so I'm wondering if I can just burn a blu-ray formatted Encore project onto a DVD, if it fits?

If so, can I be sure that the resulting disk will be to spec and thus play in all set-top blu-ray players? It is critical that, when I send this to my customer, that it be compatible with his system and I cannot test that upfront.

Any media-type constraints? I'm thinking +R vs. -R, also DL? Not so much thinking about RW

Any problem burning it on internal superdrive?

So I can calculate if my movie will fit, what's the bit rate of Encore's H.264 encoder for 1920x1080 content? If it you can set it, what's good level for a one-pass?

Thanks in advance.