Is Local Scripts OK to use to turn water / lights on and off?

Can exploiters get into different things with local script being in my game? I am really unsure. If so, I'd like some help converting these to Remote.

water on

local isOn = false
function on()
    isOn = true
    script.Parent.Value.Value = 0 


end


function off()
    isOn = false
    script.Parent.Value.Value = 1

end

function onClicked()

    if isOn == true then off() else on() end

end

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


on()

light on

local isOn = false
function on()
    isOn = true
    script.Parent.Parent.Value.Value = 0 
    script.Parent.Parent.click1.Transparency = 0
    script.Parent.Parent.click2.Transparency = 1
    script.Parent.Sound:Play()
    wait(0.3)
    script.Parent.Sound:Stop()
end


function off()
    isOn = false
    script.Parent.Parent.Value.Value = 1
    script.Parent.Parent.click1.Transparency = 1
    script.Parent.Parent.click2.Transparency = 0
    script.Parent.Sound:Play()
    wait(0.3)
    script.Parent.Sound:Stop()
end

function onClicked()

    if isOn == true then off() else on() end

end

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


on()