Scrap with high frustration factor!

The lamp would be a great toy if they would work for. On the first day you had ever dropouts that could not be resolved despite technical expertise. We tested two specimens. Both have the same problem!
The manufacturer noted, very small print, in the product documentation, that the bulbs could loosen during transport and they should then screw back the bulb and tighten the lamp again. Also what we did and it has about 30 seconds brought something. Then again no light. Also new bulbs and the review of all contacts and lines has brought nothing. My impression is that in the lamp socket must be a faulty design or material errors are present, as amended.