"ambient Light"

LED's are too blue in color to be accurate bias lighting. Ideally, you want 6500k color temp bulbs, and a neutral background behind the TV. source

When a significant portion of your watching will be in ambient light conditions always go for "bright" over "PQ". Mostly because the majority of differences in PQ can only be resolved under "batcave" conditions. Once ambient light is introduced most all PQ nuances will dissapear and brightness will be the overriding factor that will determine perceived PQ. source

I am sorry I havent made it clean , it is an I1 display LT not the pro with the handle. So how should I position the LT, hang it loose with the counterweight or try to place it flat against the screen without pressure? source

Rear-projection TVs are a nearly-dead technology as the cost of flat-panels continues to drop. Don't forget to factor in the cost of bulb changes, and beware that many manufacturers have had serious problems with their rear-projectors. With the technology being rapidly abandoned, getting parts support a couple of years from now may be difficult or impossible. source

It might be your screen resolution I have mine set to 1024x768 and I do not have to scroll to see the entire picture. To make it load faster it can be compressed and cut down in size to help out but then it would not look as good. I have cable modem so its not a problem for me but for those that are still on dial up it can get slow. source