230K views · 688 shares | Honestly I've never got to think how those signs burn. This is amazing Neon gives a distinct reddish-orange glow when used in low-voltage neon glow lamps, high-voltage discharge tubes and neon advertising signs. The red emission line from neon also causes the well known red light of helium–neon lasers. For cool chemistry experiments go here: https://goo.gl/oad3Vb | MEL Science | Facebook