Ubiquiti - WiFi - Transmit Power

Transmit Power sets the TX power of the radios.

A higher transmit power means longer range, higher signal-to-noise, and higher throughput.
Higher power levels can also increase interference, so it is a balancing act.

2.4 GHz signals travel further, and through obstructions like walls or trees more effectively than 5 GHz or 6 GHz signals.

5 GHz signals weaken more rapidly and are more affected by obstructions, resulting in around half the range of 2.4 GHz.

6 GHz signals weaken even more rapidly and are even more affected by obstructions, resulting in less range than the 2.4 GHz or 5 GHz.

NOTE: Multiple close APs can cause interference with each other, so turning down the transmit power should help mitigate this.

Recommendation

Use the lowest power level that still results in good coverage and signal strength.

Keep 2.4 GHz around 6 dBm lower than 5 GHz or 6 GHz in multi-AP networks, to keep their coverage area roughly the same.

2.4 GHz: Set to Medium.
5 GHz: Set to High.
6 GHz: Set to High.

NOTE: The actual dBm values for low, medium, and high are based on the AP model and what they are capable of.