Like anything that gets used, panels also wear a little over time. How much wear depends on your daily usage and the number of years you enjoy the television. Since the work of my post-production clients relies on perfection, I regularly touch up their displays since even the slightest drift/error needs to be realigned to spec. I also offer a “touch up” calibration service to my home video clients for a nominal fee. Projector lamps wear faster, and I recommend a touch-up every 600 hours of lamp use. Most projector lamps should be replaced after 1200-1400 hours of use with original lamps from the manufacturer and not from a generic replacement lamp website. I then continue with the touch-up process.