Would somebody check math?? 
I read this great article that has been my instruction manual, and my chicks are doing great!
https://www.backyardchickens.com/ar...first-60-days-of-raising-baby-chickens.47691/
So if I'm understanding correctly, the brooder temp should be as follows.
Week 1: 90°
Week 2: 85°
Week 3: 80°
Week 4: 75° (Starting 06/11/25)
Therefore, since I keep the temp in my home between 72°-75° and the outdoor temp should be consistently 80°+ by Week 4, does that mean I no longer need any "artificial" heating (e.g. heat lamp) at that point?
Thanks!

I read this great article that has been my instruction manual, and my chicks are doing great!
https://www.backyardchickens.com/ar...first-60-days-of-raising-baby-chickens.47691/
So if I'm understanding correctly, the brooder temp should be as follows.
Week 1: 90°
Week 2: 85°
Week 3: 80°
Week 4: 75° (Starting 06/11/25)
Therefore, since I keep the temp in my home between 72°-75° and the outdoor temp should be consistently 80°+ by Week 4, does that mean I no longer need any "artificial" heating (e.g. heat lamp) at that point?
Thanks!