%env(float:key:2:json:JSON)%
----------------------------

 ----------------- ----------------- 
  Default value     "[1, "2.5", 3]"  
  Real value        n/a              
  Processed value   3.0              
 ----------------- ----------------- 

%env(int:key:2:json:JSON)%
--------------------------

 ----------------- ----------------- 
  Default value     "[1, "2.5", 3]"  
  Real value        n/a              
  Processed value   3                
 ----------------- -----------------