Working PowerFunction Help?

Script so far, I need it so when it dips Below X Power the clickdetector disables but when it gets above X power it re-enables

Health = script.Parent.Parent.Parent.Health
Shield = script.Parent.Parent.Parent.Shield
FedPower = script.Parent.Parent.Parent.FedPower
Beam = script.Parent.Parent.VFDualBeam
Beam1 = script.Parent.Parent.VFDualBeam1
Sound = script.Parent.Parent.VFDualSound
Button = script.Parent.Parent.VFDualButton
Status = script.Parent.Parent.VFDualStatus
Effects = script.Parent.Parent.VFDualEffects
Effects1 = script.Parent.Parent.VFDualEffects1

function Damage()
    if (Shield.Value <=149) then
    Shield.Value = Shield.Value - 6.25
    Health.Value = Health.Value - 10
    elseif (Shield.Value >= 99) then
    Shield.Value = Shield.Value - 6.25
    Health.Value = Health.Value - 15
    elseif (Shield.Value >= 49) then
    Shield.Value = Shield.Value - 6.25
    Health.Value = Health.Value - 20
    elseif (Shield.Value >= 1) then
    Shield.Value = Shield.Value - 6.25
    Health.Value = Health.Value - 25
    end
end

function PowerFunction()
    if (FedPower.Value >=20) then
        Button.ClickDetector.MaxActivationDistance = 0
        if (FedPower.Value <=0) then
            Button.ClickDetector.MaxActivationDistance = 10
        end
    end

end

    function onClicked()
    Damage(onClicked)
    PowerFunction(onClicked)
    FedPower.Value = FedPower.Value - 20
    Beam.Transparency = 0.2
    Beam1.Transparency = 0.2
    Sound.Firing:Play() 
    Button.ClickDetector.MaxActivationDistance = 0
    Status.BrickColor = BrickColor.new(21)
    Effects.Fire.Enabled = true
    Effects1.Fire.Enabled = true
    Effects.PointLight.Enabled = true
    Effects1.PointLight.Enabled = true
    wait(1.2)
    Beam.Transparency = 1
    Beam1.Transparency = 1
    Effects.Fire.Enabled = false
    Effects1.Fire.Enabled = false
    Effects.PointLight.Enabled = false
    Effects1.PointLight.Enabled = false
    wait(4)
    Button.ClickDetector.MaxActivationDistance = 10
    Status.BrickColor = BrickColor.new(37)
    if (FedPower.Value <=0) then
        Button.ClickDetector.MaxActivationDistance = 10
    end
    end


script.Parent.ClickDetector.MouseClick:connect(onClicked)