How do I make a sound only play once in a while loop?

Im trying to make it where a sound plays only once whent he lights turn on/off, but since the program needs to keep checking if the lights are on or off, it also constantly plays the sound. I've tried solving this by placing a separate while loop that detects what time of day it is and when to play the sound. Any help?

while true do
	lighting.ClockTime = currenttime
	
	for _, Lamp in ipairs(Lamps) do


		if (currenttime >= 6 and currenttime <= 19) then
			Lamp.Material = Enum.Material.Plastic
			Lamp.PointLight.Enabled = false
			
			
			
			
		else
			Lamp.Material = Enum.Material.Neon
			Lamp.PointLight.Enabled = true
			
			
		end


	end
	currenttime += .01
	if currenttime >= 24 then
		currenttime = 0
	end
	wait()
end
while true do
	for _, Lamp in ipairs(Lamps) do
		if (currenttime >= 6 and currenttime <= 7) then 
			Lamp.LightsOff:Play()
	end
	
	end
end

I recommend using a BoolValue or an attribute since they have an event that only fires whenever their value (true/false) changes, which is REALLY helpful for your script.

Use my answer from an old question that has the similar problem, don't worry I explained everything there.

local Lamps = workspace.Lamps -- if the script doesn't work EDIT THIS!!!!!
local Lighting = game:GetService("Lighting")

local startOfDay = 6
local startOfNight = 18

local function checkIfDaytime(clockTime)
	if (clockTime >= startOfDay) and (clockTime < startOfNight) then -- if it's daytime
		return true
	elseif (clockTime >= startOfNight) or (clockTime < startOfDay) then -- if it's nighttime
		return false
	end
end

script:SetAttribute("Daytime", checkIfDaytime(Lighting.ClockTime)) -- creates the attribute
if script:GetAttribute("Daytime") == true then
	for _, Lamp in ipairs(Lamps) do
		Lamp.Material = Enum.Material.SmoothPlastic
		Lamp.PointLight.Enabled = false
		Lamp.LightsOff:Play() -- plays the sound
	end
else
	for _, Lamp in ipairs(Lamps) do
		Lamp.Material = Enum.Material.Neon
		Lamp.PointLight.Enabled = true
	end
end

script:GetAttributeChangedSignal("Daytime"):Connect(function() -- when the attribute changes
	local attribute = script:GetAttribute("Daytime")
	if attribute == true then -- if it's true (day)
		for _, Lamp in ipairs(Lamps) do
			Lamp.Material = Enum.Material.SmoothPlastic
			Lamp.PointLight.Enabled = false
			Lamp.LightsOff:Play()
		end
	else -- if it's false (night)
		for _, Lamp in ipairs(Lamps) do
			Lamp.Material = Enum.Material.Neon
			Lamp.PointLight.Enabled = true
		end
	end
end)

Lighting:GetPropertyChangedSignal("ClockTime"):Connect(function() -- when the clock changes
	local clockTime = checkIfDaytime(Lighting.ClockTime)
	
	script:SetAttribute("Daytime", clockTime) -- changes the attribute
end)

while true do
	Lighting.ClockTime += 0.1 -- changes the clock
	if Lighting.ClockTime >= 24 then
		Lighting.ClockTime = 0
	end
	
	task.wait()
end