How do I change the sky color only locally?

Hello,

I am making a script so that when the player's torso y position is > 1500, the sky turns to night time. I'm pretty sure the problem is that i'm trying to make it happen to only one player. When I run the game, the sky turns very bright neon white which is not what happens when I manually change the lighting.

Here is my code, written in a LocalScript located in StarterCharacterScripts:

local character = script.Parent

local Atmosphere = game.Lighting.Atmosphere
local Lighting = game.Lighting

while true do
	local pos = character.UpperTorso.Position.Y
	if pos > 1500 then
		Atmosphere.Color = Color3.new(40,40,40)
		Lighting.TimeOfDay = "24:00:00"
	else
		Atmosphere.Color = Color3.new(250,250,250)
		Lighting.TimeOfDay = "15:00:00"
	end
	wait(2)
end

Thank you again!