Unlike home projectors, cinema projectors need to be really bright. Also, colour accuracy is also important. In order to reproduce the colours accurately, the lamp should be able to produce pure white light. For these two reasons, xenon lamps are the staple in cinema projectors to this day. Although LED bulbs are capable of producing bright light, the colour rendition of LED lamps was not reliable until a few years ago. But these days, LED lamps can produce pure white light while consuming a fraction of power as that of a xenon lamp.