Special lamps are mainly used in the following areas: lamps for stage and studio, projection lamps, reprographic lamps, multimedia projector lamps, lamps for marine and nautical uses and indicator and signal lamps. The lamps primarily used in these application areas are: XBO, HMI, HTI and HSR lamps.
 
HMI lamps not only provide a high luminous efficacy of up to 100 lm/W but also offer the highest values for colour rendition. Most HMI lamps are used in film and television recording, where the quality of light is particularly important. The typical properties of these lamps include a colour temperature of 6000K, i.e. similar to that of natural daylight, and hot restrike capability.
 
The most important characteristic of HTI lamps is their high luminance, which means that the light produced can be focused and directed particularly well. This is why most modern lighting effect equipment uses HTI lamps. The high luminance makes it possible to increase the luminous output of a device, while simultaneously making the device smaller and lighter and to do all this without increasing the lamp's power consumption.
 
HSR lamps are particularly robust and their outer shell provides additional safety in handling and operation. They can be found in a lot of well-established lighting effect equipment, much of which is also often used in the outdoor area. XBO projection lamps are high-pressure discharge lamps in which the arc burns in an atmosphere of pure xenon. They operate with direct current and reach currents of over 200 amperes. Their high luminance makes them particularly well suited for large-format projection. XBO lamps produce light almost immediately and require virtually no start-up time.

Source: Osram and own research