Clicking Gui Disables PointLight?

I want to make it so when I click on a GUI, you can toggle the "Enabled" Value on every Part in the Model's PointLight, so basically you can Turn off and on every single light in the Model.

The layout is Model>Part>PointLight

script.Parent.MouseButton1Click:connect(function()
    local children = game.Workspace.Lights:GetChildren()
    for i = 1, #children do
        if i, children[i].PointLight.Enabled = true then
        i, children[i].PointLight.Enabled = false
        else
            i, children[i].PointLight.Enabled = true
    end
end)