The types of lamps are mains voltage Tungsten Halogen lamps (GU10), it is essential that these types of lamps incorporate internal fuses and are from quality lamp manufacturers. The use of inferior low quality lamps without internal fuses is not recommended and will invalidate any guarantee or warranty supplied with the dimmer switch
Using dimming electronic transformers and low voltage halogen lamps eliminates potential end of life issues with mains halogen and incandescent lamps.