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Low fault tolerance: The lamp gets quite hot, which requires a reliable cooling solution.Long startup time: Lamp projector takes about 3 minutes to start, and 10-20 minutes to reach its full brightness.Picture burn-in: Throughout the lamp's life, its brightness gradually grows dimmer.Lamp resource: 1,000 – 6,000 hours depending on the manufacturer.Poor picture quality: Compared to other light sources, which we will discuss below, this technology has poorer color rendition and less image detail.Yet this technology has many disadvantages. The principle of their operation is simple and the price is really affordable. The image projected onto the external screen is formed when the light flux emitted by the lamp passes not through the slide, but through a liquid crystal panel which consists of many electrically controlled elements - pixels. Such devices resemble ordinary film overhead projectors. This type of a projector is based on a transmissive LCD matrix. Let's zoom in now on three types of projectors: a lamp, LED and a laser one. Today we will focus on choosing a light source inside your projector because this is what forms the beam which - after processing - you see on your screen as an image. But we'll talk about that in another post. There are a lot of advantages of a projector over a TV set. But now more and more people are choosing a projector for use at home or for outdoor projection. Until recently, projectors were used mainly in cinemas or for business events.