620 lumens sechsundertzwanzig lumen. when calculating the light power, the light / color temperature 2700K should miteinfließen. then the bulb to light and above all too glaring to me. at 620 lumen light would be given until an optimal k with a light / color temperature of 2300 or 2400 for me. but above all lacks the light, the heat, which saves more energy but makes the room also gefühlskälter. why I can not say. So I recommend this pear for workrooms and places
