When you say "solid white door", I assume you mean solid as in no glass/windows. Is it a solid wood exterior door or a standard hollow core interior door? Have you done any other sound isolation in the room?
If you haven't done any other sound isolation in the room (insulation, double drywall, etc.), the doors probably aren't going to make sound isolation much worse. Someone else will have to comment on the glass with the sub. I would guess that if the sub is that close, you will probably have issues with the glass rattling. I also don't know what issues the glass would cause with sound reflections. I'm sure someone will chime in soon.
As far as light, it depends what is outside the door. If it is a hallway with no windows and the lights can be turned off, it may not be as much of an issue. Some light will make it through the glass, so you would have to come up with a way to control it (which may defeat the purpose of wanting the glass doors). Maybe you could hang some curtains in the room that could be open/closed.
I personally would avoid this type of door in a theater, but that's just my opinion.