They are pretty, I am particularly fond of the blue ones - as long as their behind somebody else’s vehicle.Just remember, at those speeds on roads not built for them, you can never be certain who you may be putting at risk.
Even when I use my emergency equipment, I must practice "due regard for public safety" as I haul ass to an emergency call.
How does one define due regard? It means if I cause a crash due to my speed or lack of road conditions and/or traffic, I wasn't using due regard regardless of my pretty lights and annoying siren. Self-fulfilling prophecy imho.