Car Auto-Headlights Not Working - Help?

So I have always wanted to make auto car lights and yet I haven't got anywhere with it yet because whenever I test it in play mode it won't turn on once it gets past 5 PM. Here's the code:

function OnChildAdded(Child)
while true do
    wait(0.001)
    if Child.Name == "SeatWeld" then
    script.Disabled = false
    for i, v in pairs(script.Parent:GetChildren()) do
    if v.Name == "HLPart" then
    if game.Lighting.TimeOfDay > "17:00:00" and game.Lighting.TimeOfDay < "06:30:00" then
        v.Material = "Neon"
    elseif game.Lighting.TimeOfDay > "06:30:00" and game.Lighting.TimeOfDay < "16:59:00" then
        v.Material = "SmoothPlastic"
    end
    end
    end
    end
end
end

function OnChildRemoved(OtherChild)
    if OtherChild.Name == "SeatWeld" ~= nil then
    for i, v in pairs(script.Parent:GetChildren()) do
    if v.Name == "HLPart" then
    v.Material = "SmoothPlastic"
    script.Disabled = true
    wait(0.001)
    script.Disabled = false
    end
    end
    end
end
script.Parent.ChildAdded:connect(OnChildAdded)
script.Parent.ChildRemoved:connect(OnChildRemoved)

Any help on this would be much appreciated. Thank you!