Getservice script wont work when stepping on a button,help?

I watched some youtube tutorials and made this script using the tag editor plugin and this video:https://www.youtube.com/watch?v=-oPE0PL2Zew

However my script still doesn't work.

I have a button and inside it this script:

local function onTouch(hit)
	workspace.blackout.Disabled = false
	
end

script.Parent.Touched:Connect(onTouch)

and that works,what doesn't work is this:

local CollectionService = game:GetService("CollectionService")

local TaggedParts = CollectionService:GetTagged("light")

for _, TaggedParts in pairs(TaggedParts) do
	TaggedParts.light.Enabled = false
end