Tree would be a night time advantage if you don't have night sites on your gun. I have a PT145 and haven't found some night sights that will fit, so I used some glonation glow in the dark paint on my dots. I sit the gun under a lamp while geting ready for bed. The pain glows really bright but I don't really know for how long. So it really isn't that much help if its dark and I have been carrying. In pitch black home situation at night, you need something to be able to index your muzzle on target, even if you can't hit a bullseye, you need to at least get it on COM.
I am considering one for my gun and possibly my wifes Bersa.