Random isnt very random?

ok. so;

L = script.Parent.PointLight

function RNG()
	
	local N = math.random(.1,1.2)
	L.Brightness = N
end

while true do
	wait(math.random(.7,1.4))
	RNG()
end

The wait random timer works fine, however, when the brightness gets changed by the "RNG" function it only goes from one brightness, then to zero, and doesn't even stay within the random parameters. (It flips back and forth from zero to one brightness each time the while true loop runs)