I agree with the review that this is a defective product. My bulb blew at 312 hours. Wasn't under warranty and cost me another $400+ to replace. Panasonic service online and on-phone are terrible. Then had same problem with cycle-on and cycle-off. Took it in person to nearest Panasonic authorized service center (75 miles away) and they told me it was just dusty and charged $120 for the evaluation and cleaning. Came home and it still does the same thing. Service center now out of business and Panasonic wants me to ship it to Kansas. Judging from all the online info this is a lemon and Panasonic knows it. The bulb life is a joke and the power supply is faulty. Will not go with Panasonic again. Now I am looking for a good replacement as fixing this one will likely run hundreds. My current bulb is at 295 hours so even after it is fixed I am afraid it will blow soon and another $400+ will be needed.