I came home today and switched on my Infocus X-1 and noticed that the picture is extremely dim now. I just passed the 3000 mark on the lamp hours, but it's supposed to be good for 4000, even though i've been told to replace it before that. But is this normal for a lamp to lose so much brightness? I was under the impression that the lamp wouldn't go dim, that I would just get an on-screen warning that the lamp was about to expire. Also, what does a lamp for an X-1 go for now? I heard $300, but this was 2 years ago, I hope they've dropped by now?