Lamp sockets for integrating spheres
Precision measuring sockets and standard lampholders for different lamp types.
Precision measuring sockets are special quadri-pole type of lampholders with two separate galvanic connections, each of which has a point of contact with the lamp, one for the supply of the lamp and the other for the voltage measurement.
Electrical Data of Measuring Sockets for Vehicle Lamps
Electrical Data of Measuring Sockets for General Purpose Lamps