Hello, I can only recommend to clean the glass lens from the inside after a few years. In my case, after 7, or 9 years, dust/dry was collected. That doesn’t sound like anything far-fetched or complicated, it’s also not yet. Nevertheless, the few think of doing this and the result can be shown. To do this, you only have to flop 3 T20 screws, and go over with a fuss-free cloth and (harmless) screen cleaner. shown: https://www.youtube.com/watch?v=cQKKxZwm-lg By the way, my 65W pears have left absolutely no damage Unfortunately you are no longer produced by Osram.