Three lamps were bought: a kitchen of 9 meters, a bedroom of 12 and a nursery of 14 meters. Everywhere there is more than enough lighting. For 20 meters it will not work, perhaps the 550th model will cope with such a room. I haven’t bought it for the living room yet, I’m just looking at the 550th
To give a more authentic representation of my experience, I have included some photos with my review.