After I tried the (GU10, E14 and E27) LEDs from different manufacturers are the lamps of Greenandco my clear favorite. The build quality is consistently solid, the price is really reasonable, especially the light color and size of the bulbs has ensured that I have now replaced all the halogen and energy-saving lamps in the house against LEDs.
However, as described, I tested only the lamps with GU10, E14 and E27 sockets.