The energy saver high volt lamps have been developed new the basis for this is an optimised spiral design as well as the xenon technology in case of the low volt lamps osram depends on the tested irc technology based on the principle of heat recovery owing to a special coating on the lamp bulb infrared coating the heat radiated by the spiral is diverted back to it again and thus remains within the lamp thus very little energy has to be supplied from outside in order to bring the spiral t