On Monday, 5 October 2015 09:55:20 UTC+1, John Rumm wrote:

If you wander round when is now known as the "adventure island" theme
park in Southend at night, its got loads of discharge lighting - in any
run of lamps they quite often alternate high pressure sodium with
mercury... So you get the yellow / pinky cast from the sodium, and a
slight blue / purple tinge from the mercury. The effect is actually
quite pleasing (far more so than either technology on its own would be).

When mercuries were more popular, so many places had either mercury or sodium, and I always wondered why someone didn't choose to install a mix.


NT