Streetlight Not Turning Off When Supposed To?

So I'm working off of roblox wiki, and am trying to make the day + night system and a street light that turns off according to the day.

I am new to coding, but wanted to try doing it slightly differently from them, and here's what I got:

script for day / night, inside workspace:

minutesAfterMidnight = 0
while true do
	minutesAfterMidnight = minutesAfterMidnight + 3
	game.Lighting:SetMinutesAfterMidnight(minutesAfterMidnight)
	wait(.1)
end

now this is working fine, but my Streetlight doesn't work properly.

here is streetlight script:

if game.Lighting:GetMinutesAfterMidnight() == 6 * 60 then
	script.Parent.LightBulb.SpotLight.Enabled = false
end

if game.Lighting:GetMinutesAfterMidnight() == 18 * 60 then
	script.Parent.LightBulb.SpotLight.Enabled = true
end

the light only flickers off for about 2 seconds and closer to the night then the morning.

Hope you can help and thank you for your time.