GetChildren help to reach a destination?

Hello, thanks for reading.

Error: 17:27:14.449 - Workspace.Meltdown Detector:63: 'end' expected (to close 'function' at line 6) near '<eof>'

I am having trouble with GetChildren while getting to the destination.

So, this is part of my script

        local mainframelights = workspace.MainframeLights:GetChildren()
        for i = 1, #mainframelights do
        mainframelights.Light.PointLight[i].Color = Color3.new(255, 0, 0)
end

And this is my module workspace:

Workspace
    MainframeLights (Module)
        Light (Module)
            Light (Part)
                PointLight (PointLight)
        Light (Module)
            Light (Part)
                PointLight (PointLight)
        Light (Module)
            Light (Part)
                PointLight (PointLight)
        Light (Module)
            Light (Part)
                PointLight (PointLight)
        Light (Module)
            Light (Part)
                PointLight (PointLight)
        Light (Module)
            Light (Part)
                PointLight (PointLight)

Thanks if you helped! :)