For LCD projectors, there is an advised number of uses as far as determining the useful life of their main lamps. Normally, the need to replace these lamps is a reality, especially for projectors which are used ever so often for business or daily home entertainment pleasures of consumers.
Sony has its share of LCD projectors and for the people looking for a suitable replacement projector lamp, here is one good lead you can get from Amazon if you are looking for a Sony XL-2200 LCD Projector Lamp replacement part.
Rather than let your projector slack off and gain dust by the shelves, have the projector lamp checked. Normally it is the first thing that gets busted, especially if you have been using it frequently.