Brightness From Projectors

[dipset420]

Will this be the same as looking at a 56" rear projection DLP.

I want a projector (Optoma HD70) and my room is like 9' wide and about
10-11' long.

Now if i have a screen in the 80-90" range will my eyes hurt from the brightness?

because when i had the 56" tv it was unbareable and i would of went blind in days.

Now I'm under the impression that since the projector is behind me and projecting against the screen that it wont hurt my eyes any where near as much as a rear projection unit because its projecting the image from the back of the tv to the screen which is right in front of me, so am I correct on this.

I would be sitting about 9 feet away from the screen if I get it.

And I know one reason it was so bright in that distance was because my room isnt really wide so that brightness from the image wont spread out that much because in my living room i have a 56" rear projection sitting about 8 feet away and its no where near as bright as when i had the 56" in my room because my living room is wide enough for the image to spread out.

So would it be a bad idea to get a projector or will it not be as bright? I plan on getting the Optoma HD70 and using it in the lowest brightness level.