Recently there have been these luminaires now for 20 the piece and then I slammed.
In direct comparisons, the 9W are at least as bright as the little angejahrten 15W energy-saving lamps. Since the brightness in my case, but is full enough I finally prefer the immediate full brightness.
For the cheap price, I am fully satisfied and if this last as long as the instructions describe (25 years at 2.7H day) be my ceiling lamps probably get never to see another light.
The light color of 2700K is characterized more yellowish and creates a pleasant atmosphere. If you look outside the window, there is no uncomfortable blue shimmering light like fluorescent lights or LEDs cheap but like old times "light bulbs"