So i just got the halo X-ray 800. Works awesome so far and has been dead accurate. Only question I have is does anyone know how dusk/dawn mode works? Is it automatic or do I have to do something to switch it on? I tried it when it was starting to get dark On a tree and couldn't see the numbers because they display in black. So what I did was range the tree then move off the tree towards the sky and I could see it. It didn't come w any instructions so just wondering if there's something I'm missing.