As I understand it .. the 6000k "look" brighter when you look at them, as the colour temp is higher, but due to the way the human eye actually "sees" things, via reflected light, the 4100K are actually better at night, they have more of the wavelengths that you need on order to see things.
This idea can clearly be seen using an LED torch. Such a torches "white" light is actually just 3 narrow bands of red, green & blue that gives the "appearance" of white. Take such a torch and try and look at a decent "family setting" type colour photo .. you know wife, kids, trees.. something that has many different
variations of colour, shades etc.
It will look very "washed" out and bland as the LED source does not have the wavelengths of light to reflect the "real" colours in the picture.
The same effect occurs when you use "high colour temp" bulbs ... white lines may look brighter .. but you might not see the child in a brown jacket against the trees.....

HTH