EIRP. There's some gain involved.

I think they're claiming the actual transmit power is 240W (23.8 dBW), and the EIRP is 63.1 dBW.

I am sort of skeptical of the claimed gain... even at 6GHz, you need a 2-meter parabolic reflector to get 40dB, the array is 1/10th that diameter. EDIT: Ignore this second paragraph I misread the spec page.