Why do my lights turn off, but not back on?

Pretty self explanatory... They'll turn off at 06:00:00, but when it comes to 18:00:00, they don't turn on.. :/

Update (Added prints)

minutesAfterMidnight = 0

function checkDecendants(parent, enabled)
    print(enabled)
    for i, v in pairs(parent:GetChildren()) do
        if #v:GetChildren() > 0 then
            checkDecendants(v)
        end

        if v.Name == "SpotLight" then
            v.Enabled = enabled
            if enabled then
                v.Parent.Material = Enum.Material.Neon
            else
                v.Parent.Material = Enum.Material.SmoothPlastic
            end
        end
    end
end


while true do
    minutesAfterMidnight = minutesAfterMidnight + 2
    game.Lighting:SetMinutesAfterMidnight(minutesAfterMidnight)
    wait(0.1)

    print(game.Lighting:GetMinutesAfterMidnight(), minutesAfterMidnight)

    if game.Lighting:GetMinutesAfterMidnight() == 360 then      -- checks for 6AM
        print("Off")
        checkDecendants(game.Workspace, false)
    elseif game.Lighting:GetMinutesAfterMidnight() == 1080 then     -- checks for 6PM
        print("On")
        checkDecendants(game.Workspace, true)
    end
end

output:

4 4  -358 358
360 360
Off
false
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
362 362
364 364 - 1078 1078
1080 1080
On
true
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
1082 1082
1084 1084