[SOLVED]Why are the lamps are not turning on at night when the time reaches 0?

I am trying to make a script that turns a lamp on when the time is past 19:00:00. It works fine till 23:00:00 but then the time reaches 0 so then the lights are turned off even though it is still night. Can you tell me how can I possible fix this?

local lights = script.Parent.Bulb:GetChildren()
local lighting = game.Lighting

while true do
    wait(0.5)
    if lighting.ClockTime < 19 then
        for i,v in ipairs(lights) do
            v.Range = 0
        end
    elseif lighting.ClockTime > 19 then
        for i,v in ipairs(lights) do
            v.Range = 60
        end
    end
end