There are thousands of varieties of hot pepper in the world, varying in heat and flavor profile.  Some, like a Poblano, are mild and used mostly for flavor.  Some, like habaneros or Scotch bonnets, have a strong kick.  There is an entire industry around outdoing the current hottest pepper with an even hotter one.
 
This combination of pepper is only a LITTLE hot, suitable for adding to a spicy tomato sauce or stir fry.  We can all use a little something to perk us up!
Because this is handmade with natural materials, variations should be expected.