Purple is used in USA on Funeral Lead Cars and hearses. Unfortunately, they too have changed to those awful LEDs. I'd probably get halogen bulbs for that and really brighten it up. Although, I did that one time before with a light and actually melted it, because it was that cheap WOLO plastic junk... Had a different styled one, and it melted the spinning rotator. The flashlight bulb of the time was all it could handle.
Yes and No, this largely depends on your location. Yes Purple is typically Funeral, however as of late other groups have started using it, like private security agencies. Not all Funeral Homes use lighting, some did but no longer do so.
