Velleman k8071 power led driver kit velleman k8071 the velleman power led driver kit k8071 is a medium difficulty project kit that when assembled is capable of driving either up to 4x 1w or 2x 3w leds contains all necessary components as well as a fully detailed illustrated assembly manual meaning that with just a soldering iron and basic tools anyone can construct this unit when assembled and functional this unit is suitable for a wide range of applications such as home stage and arch