Why does not LIGHTING return to normal?

The script works but when it arrives the part does not execute the:

game.Lighting.Brightness = 0 game.Lighting.OutdoorAmbient = Color3.new(75, 75, 75)

and the same view and does not return to normal.

function REffects()
	wait(2)
	game.Lighting.FogColor = Color3.fromRGB(0, 0, 0)
	game.Lighting.FogStart = 10
	game.Lighting.FogEnd = 1000
	game.Lighting.Brightness = 100
	game.Lighting.OutdoorAmbient = Color3.new(255, 255, 255)
	wait(2)
	game.Lighting.Brightness = 0
	game.Lighting.OutdoorAmbient = Color3.new(75, 75, 75)
	local m = game.Workspace.Road6.Monster2
	m:Destroy()
end
script.Parent.Touched:Connect(REffects)

I think if you touch it once and don't move it should work. But maybe you just can't work on lightning from the script because as I tested script to just make brightness 0 it did nothing