I've had these hids for a number of years now, when I bought them they had the bigger analog ballasts, last year one of the ballasts went bad and I replaced them with the newer slim digital ones, tonight while coming back from deer hunting they just don't seem to be as bright as I remember, so the question is ,do they get dimmer as they get older or is it just me? I have a extra set of bulbs I could put in and see if it makes a difference in brightness.