I think the brightness is partly because they are so yellow-red in terms of the light they give off - the rest of the house has colors close to daylight and it only looks like they would actually not emit as much light as expected. There are 10 of these in the lamp, which is equivalent to a 150 watt light bulb, and that should be enough in the lobby. Next time I'll probably go for the equivalent 20 watt version, but I really wanted the coil!
Ceiling lamp Yeelight YLXD013-B, 50 W, number of lamps: 1 pcs., color: white
62 Review
Lamp LED Yeelight Smart LED Bulb W3 (YLDP005), E27, A60, 8 W, 6500 K
47 Review
Lamp LED Yeelight Smart LED Bulb 1S, YLDP13YL, E27, 8.5 W, 6500 K
43 Review
Lamp LED Xiaomi Mi Smart LED Bulb Warm White (XMBGDP01YLK), E27, 8 W, 2700 K
26 Review