1 script for multiple bricks - ClickDetector for Spotlights. Why doesn't it work in my place?

So I am having an issue with my script, and I have done all I could to solve it. What I want to do is create a function that turns on multiple lights with a simple on and off switch.

script.Parent.ClickDetector.MouseClick:connect(function()
	for _,Part in pairs(workspace.Lights.CL:GetChildren()) do
		if Part:FindFirstChild("SpotLight") then
			Part.SpotLight.Enabled = true
		end
	end
end)

So this is what I've done to troubleshoot with no success:

-- I've tried to change the names of the models I used them for.

-- I've deleted the Part/Model and recreated it.

What is interesting, however:

-- It works in studio mode > Play here with other places/games.

-- It works if I paste the code and write in the name for each Part/Model (which is a waste of time).

Any help? I'm still learning to code, so any help I can get would be useful. thank you!

This should work to enable the lights with 1 button:

local lights = game.workspace.Lights

function onClick()
	for i, v in pairs(lights:GetChildren()) do
		v.SpotLight.Enabled = true 
	end
end

script.Parent.MouseClick:connect(onClick)

I am not sure how to disable the lights but that will work to enable them.