How to use the "see_in_dark_ built in var? o.o All i wanna know, can anyone help?

This determines how far the mob can see in the dark. The scale is just like luminosity: a value of 1 illuminates the mob and its location; 2 illuminates the immediate surrounds; and so on.
In response to Jemai1
Yea i kinda put 2 and 2 together and got that but like, whats considered dark? and how do u make it "dark"?
In response to Reno Kujika
Set the luminosity var to 0.

luminosity = 0