This thing works great, in the dark. So how hard are these screens to see if not inside a cabin. Do the screens darken with age or are they just old technology. I love the readout on this thing its just that covering it and my self in shade to see it kind of takes up the time I am supposed to be fishing. Also it is rather large but thats OK I just put it in where the wife used to take up space. Any imput appreciated.