I need help with the bullet material. Line 13. What is wrong and how should it be done?

return {

toolname 	= "Raygun";	
firemode 	= 2; -- 1 = AUTO 2 = SEMI 3 = BOLT
rpm		 	= 181;
damage		= 1000;
spread		= 0.02;
muzzle      = "MuzzleFlash";
firesound	= {"rbxassetid://131179973";};
reloadsound = "http://www.roblox.com/asset/?id=131164874";
volume		= 2;
bullet		= {
	outline = false;
	color   = BrickColor.new("Lime green").Color
	Material = "Neon"
};

Materials should be used like this.

Part.Material = Enum.Material.Neon