RHP outgassing dangerous to snakes?

[Luvyna]

I have 2 VE RHP's wait for the enclosures to show up.... So to Burn them in, Lay Face up and plug directly into outlet Correct?

and I can do this in the garage so no fumes get to me or the snakes if it's a bad smell

Yes this sounds right, I'd recommend doing it in a covered area outdoors for 48-72 hours if possible since there is more airflow and the fumes can be pretty strong