Fast and easy connection of series connected string bulbs, with me there were versions for GU10 LED Spot and stair lights. Due to their small dimensions, the two plug-in connectors and a terminal block connector are ideal for quick installation work. Thus one can take the circuit in advance in operation and subsequently mount the lamps, for example, after removal of the ceiling and walls. Less risk of tool damage and contamination by dirty hands, on the freshly painted walls decorated and ceiling.