I just purchased an Optima HD70. I previously owned an Infocus X1. I put 3000 hours on my first X1 bulb, purchased another one since I thought the first one was getting dim, and then put 3000 hours on the second bulb. The X1 bulb was rated for 4000 hours. I found that the dimming of the output prevented me from enjoying the picture on my X1 before the rated hours. Has anyone else had this experience? How much of the rated bulb life have you gotten out of your projector? Just curious. I would like to get an idea of how long my HD70 bulb will really last, before it will need to be replaced. I also thought it my be useful to share our experiences on bulb life.