More important question is at what range does F35 detect the radar when radar is using that much energy. It is a deterrent but if the F35 can detect and kill your radars from several hundred kilometers that isn't enough for protection on its own.
It has been said, Spectra's passive detection range is more twice that of APG-81's active detection range.
The second matter is electronic warfare, imagine enemy is using F35 alongside multiple powerful EW systems, will radar be able to resist EW while maintaining maximum detection range?
Obviously not. In that case radar has to burn through to see. Which will inevitably decrease its effective detection range.