Negatives:
Above the E14 threaded lamp body is cylindrical. (In the pictures above the thread in the enlargement to see). The diameter is about 3.5cm here. The edge of the lamp coincides there exactly with the edge of our frames.
Therefore, the lamp was not screwed deep enough into the socket to make contact with the center conductor.
For us, the problem was easy to solve, since we were able to raise the central contact simply by about 2-3 mm (bending).
!!! Therefore, I draw from just one star. !!!
Should the central contact in the version not to bend - could pose a big problem. If necessary, then do not work the lights. (= 0 stars)
Generally, it would wünschensert when the housing would start 3-4 mm later, the thread would be a bit longer, or the plastic part could be designed conical easy.