Halogen low-voltage lamps without reflectors are offered in a wide range of voltages and wattages, from 6 to 50 V and from 10 to 590 W. Some lamp models are available as "XENOPHOT® " versions (HLX® types). With xenon instead of krypton as the filler gas, these lamps produce a luminous flux up to 10 per cent higher than lamps with otherwise identical data.