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Toshiba DLP TV User Manuals state "The average useful service life for the lamp is approximately 8,000 hours in LOW POWER or 6,000 hours in HI BRIGHT MODE.".
However there were problems with certain 2005 Toshiba models that saw the lamp life be only 100's of hours or less. Toshiba replaced the lamps in these models at no cost and extended the lamp warranty to 2 years. Whether or not Toshiba has resolved the problem remains to be seen, as only time will give the real indication. There also seems to be lamp issues with some 2004 models as well, but Toshiba does not seem to be stepping forward to resolve the issues in this case. The customer ire is starting to rise as indicated by this review. Will there be similar problems for the 2006 models once enough time has elapsed?
Maybe the real lamp life is an average of 1500 hours as indicated by this.
Most people probably would use the information provided by Toshiba to make a decision about what the lamp maintenance costs would be for DLP ownership. However if the real lamp life time is 1500 hours, then that's a 400% increase in costs over what Toshiba is presenting to customers. The cost of a lamp is $200 or more, and for a family household that averages 6 to 8 hours of TV viewing per day, this translates to a new lamp every 187 to 250 days. Strangely enough the Toshiba warranty on a replacement lamp not covered by the original TV warranty is 180 days.
Maybe the death blow has already been struck. It appears that Future Shop, probably the largest electronics retailer in Canada, no longer carries DLP TVs in its product line."