What range can a constant frequency indoor ceiling lamp antenna cover?

This depends on the wireless signal power allocated to this antenna in the project, and usually the range of 5- 10 meter can be covered. However, it depends on the surrounding environment. A complex environment with more shielding will affect the signal coverage. Direct waves in 400mhz and 150mhz bands are often used in engineering, but they will not be reflected when they encounter shielding, so the signals will be attenuated.