For example Boxlight products are virtually identical to the InFocus machines. This is not necessarily a bad thing - if you look around you can often find the same machine under a different badge at a lower price. Return to questions 11. Metal Halide Conventional bulbs use a metal filament that glows hot to produce light. Metal halide bulbs discharge electricity through a gas to produce an intense white light.
Metal halide is used in all but the budget range of projectors.
If a metal halide bulb is turned On or Off too frequently the life of the bulb will be reduced. Similarly when turning off the projector it is often advisable to switch off the bulb whilst leaving the power on for a couple of minutes to allow the fans time to cool down the bulb. Metal halide bulbs glow less bright with time, if you feel that the image is not as bright as it once was, it may time to consider renewing the bulb. Return to questions 12. The Future Projectors will continue to get brighter and smaller.