Velleman dimmer for electronic transformers velleman k8068 p the velleman dimmer for electonic transformers kit is suitable for incandescent lamps mains voltage halogen lighting and low voltage halogen lighting in combination with an electronic transformer a brief push toggles on off while continued pushing engages dimming action there is also a soft start feature to make the lamps last as long as possible this dimmer unit is also available as a pre assembled module p velleman k8068