Blue light causes your pupils to dilate more than they would with a yellower/redder color. They seem brighter to the human eye because it is skewed towards daylight, so while you can see colors, etc, better, the areas not lit are gonna be pitch black.
Lights on top of the buggy, unless they're spots, just seem to light up the shocks and shiny shit and reflect it back into your eyes.
I'm gonna experiment with this:
Bummer is I lose about 15% of my light output, so it's a catch 22...