Led configuration in json config

Hi Guys,

How do i configure this part of my config ? Hypercon ALWAYS creates false config(ambilight simply doenst work with it) so i cannot rely on it, i have to edit everything manually.
Whats hscan vscan min max ? I have above 500 leds and after 90 or so there are no entries and i have no idea which values to give as they are different for every led.

// LED CONFIGURATION
"leds" :
[
{
"index" : 0,
"hscan" : { "minimum" : 0.9855, "maximum" : 1.0000 },
"vscan" : { "minimum" : 0.9500, "maximum" : 1.0000 }

Hold on i did something wrong apparently for months. Hyperion SEEMS to create a good file now.
Let me check again when i get back from work :)I'm also checking redoing all from scratch