Code randomly broke?

Any recent updates that could have broke this code? This has worked for the past like two weeks and today it just suddenly does not work anymore and I am not sure why. Can anyone explain why this doesn't wok or how to fix it? It's just a script in the Workspace that makes the place darker as night comes and brighter as day arrives:

local l = game:service("Lighting")

while true do
    wait()
    if l.TimeOfDay == "17:50:00" then
        l.Ambient = Color3.new(55/255, 55/255, 55/255)
        l.OutdoorAmbient = Color3.new(90/255, 90/255, 90/255)
    elseif l.TimeOfDay == "18:45:00" then
        l.Ambient = Color3.new(0/255, 0/255, 0/255)
        l.OutdoorAmbient = Color3.new(24/255, 24/255, 24/255)
    elseif l.TimeOfDay == "05:35:00" then
        l.Ambient = Color3.new(55/255, 55/255, 55/255)
        l.OutdoorAmbient = Color3.new(90/255, 90/255, 90/255)
    elseif l.TimeOfDay == "06:25:00" then
        l.Ambient = Color3.new(126/255, 126/255, 126/255)
        l.OutdoorAmbient = Color3.new(182/255, 182/255, 182/255)
    end
end