For me, the lamp has contributed to a noticeable improvement in my well-being feeling. From morning to evening, "now the sun shines". Not only in the dark season a herrvoragendes device for unobtrusive light shower.
A slight flicker in the lower watt level I have also observed. However, the flickering leaves after about 10 minutes operating time significantly.
I personally use this lamp only in the full wattage: Why this delightful (sun) light throttle in its intensity ???? That was - at least for me - Finally, the purchase criterion !!