HID lamps are generally used when high light output is necessary along with energy efficiency. Areas where HID lighting would be useful include gymnasiums, warehouses, movie theaters, sports stadiums,roadways, parking lots, and more. HID lamps have even been used recently in retail and residential installations due to advances in reduced lumen bulbs. Ultra-High Performance (UHP) HID lamps are even used in LCD TV sets or projection displays!
HID lamps are a common light source for indoor gardens. They are perfect for indoor gardening, especially plants that require high levels of direct sunlight. They can be used to reproduce tropical sunlight for indoor aquariums.
UV-blocking filters are necessary when using HID lamps to prevent UV-induced degradation of the lamp fixture components and to ensure the UV does not negatively affect animals, human beings and dyed objects in the path of illumination.
Beginning in the early 1990s, HID lamps have seen applications in automotive headlamps. Xenon or High-Intensity Discharge (HID) lighting provides brighter headlights and increases visibility of many peripheral objects (i.e., street signs and pedestrians) left in the shadows by standard halogen lighting. HID lamps are used in high-performance bicycle headlamps as well as flashlights and other portable lights, because they produce a great amount of light per unit of power. As the HID lights use less than half the power of an equivalent tungsten-halogen light, a significantly smaller and lighter-weight power supply can be used. HID lamps have also become common on many aircraft as replacements for traditional landing and taxi lights. HID lamps are also used in lamps for underwater diving. The higher efficacy of HID lamps compared to halogen units means longer burn times for a given battery size and light output.