I just bought this KLEIN for $60 dollars at Home Depot. More than I wanted to spend, but Klein is a top brand name, and since I plan on breeding combo-morphs and piebald designer babies, I need to make sure the temps are perfect!

I am using a rack with plastic tubs, With this infrared thermometer gun, I should aim it at the bare plastic under the substrate where the heat-tape is and get around 92 Fahrenheit. Then aim it at the cool side of the tub and get around 82 Fahrenheit. Is this the right method?