Pear OK lampshade bad

Had bought the lamp. It works, is handling OK. Simple design. Use the lamp about 12 hours a day to bring my houseplants through the winter. The light is in order, the plants have recovered visibly after a short period of Darbens.

But: After 6-8 weeks, cracks formed in the switch. Shortly thereafter took place a short circuit which paralyzed the whole lamp. Then I swapped around the lamp. When replacement lamp exactly the same picture. Cracking in the area of ​​the switch. This time remained from the short circuit, but the switch is no longer usable. Now pull the plug every time to turn it off. For a product of an alleged brand manufacturers, I am quite disappointed, especially since it is obviously not an isolated case, if the same defect occurs at several lamps.