Light the face before the room
Video calls usually improve most when the face is lit from near the camera. A bright room behind you can still make your face look dark.
Avoid overhead-only lighting
Ceiling lights can create shadows under the eyes and make webcams hunt for exposure. A small front or side light often looks cleaner.
Desk lighting is a different job
A monitor light bar helps the keyboard and desk surface, but it may not improve face exposure. Choose the light based on the job, not the category name.
Test glare before keeping the box
Glossy monitors, glasses, and bright windows can reflect light into the camera. Test placement at the times you actually take calls.