He said the spread of purple street lights reminds him of when Citgo Petroleum Corp. replaced the neon tubes on its famous Kenmore Square sign with LEDs in 2004. In Waller’s view, it messed with ...

or the glow of a neon sign? Sorry to burst your bubble, but it does not exist on the visible light spectrum. Zab Johnson, an expert, notes that purple is just a mere pigment of our imagination.

Many LGBT people have been sharing examples of TV programmes, films and music videos to highlight the development of so-called "bisexual lighting" - characterised by the simultaneous use of neon ...

The color of the neon light depends on the gas mixture inside ... Red auroras are often seen at the higher edges of the display. Blue and purple auroras are even less common and also tend to ...