
I use this to test lightbulbs and it does the job. The cord is quite thin and I wouldn't trust it to a high wattage incandescent bulb, but with modern LED bulbs this shouldn't be a problem.

Smart bulb Yandex with Alice, base E27, 8 W, RGB color
76 Review

Lamp LED Xiaomi Mi Smart LED Bulb Essential (MJDPL01YL), E27, 9 W, 6500 K
113 Review

Lamp LED Yeelight Smart LED Bulb 1S, YLDP13YL, E27, 8.5 W, 6500 K
43 Review

Ceiling lamp Yeelight YLXD013-B, 50 W, number of lamps: 1 pcs., color: white
62 Review