... the case, convenient for testing5. Each lamp with a switch and roller, portable one6. Very useful and economic7. ... for GU10,two standard 3-pin sockets, two dimmer switches and a multi-functional test in high ... as two standard 3-pin sockets. One dimmer switch controls the high voltage base zone, the ... in high voltage zone, turn on the switch ,then use dimmer to control lamp brightness and power meter ...