For Gen 1:

1)Log into ColorVu camera web GUI

2) Go to Configuration > System Settings > External Device

3) Set "LED Brightness Adjustment" to manual 

4) Adjust "LED Brightness"





For Gen 2:

1) Log into ColorVu camera web GUI 

2) Go to Configuration > Image > Day/Night switch

3) Set "Light Brightness Control" to manual

4) Adjust "White Light"