The Sony D Series of projectors are tailor made for businesses and organisations looking for cost effective but high quality equipment. Once you have one of these projectors you will use it all the time. Which means that sooner or later you are going to have to replace the lamp. How To Tell When Your Projector Lamp Needs Changing Original projector lamps do have a long lifespan of several thousand hours. But there are a couple of tell-tale signs that your lamp may be nearing the end of its life cycle. The first sign is that the quality of image will begin to deteriorate. If you notice this is well worth replacing your Sony D Series projector lamp immediately. You may also notice a yellow tinge appearing on projected images. Again its time to change the lamp. Original Sony Product This replacement lamp for your D Series projector is an original Sony product. You can be sure of its quality and is easy to install into your projector.