What screen for high ambient light room?

Thanxforresponding!

Distance is 18 feet. What ever normal is. I am an encyclopedia of Hi Fi information and the reciprocal when it comes to video.  

@mijostyn

What ever normal is.

Go into the settings and see which you are on:
Cinema 1, Cinema 2, Cinema 3, Natural, Stage, Dynamic, User 1, User 2, THX

Is it bright enough? If you go on the remote and select Cinema 2 and then THX, how does they look (brightness and color wise)?

We are professional home theater designers and you have several major problems

1: JVC projectors are low lumin projectors

2: You have ambient light spill over

3: Your Grayhawk does improve contrast but is vastly inferior to ambient light blocking screens.

An ambient light reflecting screen will help as well as switching to a much higher lumen output projector you should be looking at a projector with 2500-3,000 lumins, most of the JVC projectors are 1,800 lumins

There are also DIY retrofitable battery powered blinds by Lutron

Have you considered a drape you can slide accross the room's opening to stop the light spillage?

Dave and Troy
Audio Doctor NJ

We Already have a black out blind in the most offending window but there is spillage around it. I suspect there are better. A laser projector will fix the lumin problem. The ones I have looked at are all 3000 lumins. I think the drape would push my wife a bit far plus most of our casual watching is done from the kitchen. We generally sit down to watch movies at night.
I certainly could fit a better black out drape. I think the easiest thing to do is change the screen. Is there a particular screen you like best in this situation?
Thanx!

Online calc says you get about 14fL of brightness currently, good for low ambient light, bright for a dark room.

A 1.1 gain would yield 17fL, not a huge difference, and at the expense of black levels, unless getting ALR.

With the Optoma UHZ65 laser projector with the same size/distance/gain, you would get  >23fL, and the calculator states good for rooms with ambient light.