I used red heat lamps for years in Ohio brooders.
Then it dawned on my that using heat lamps didn't allow providing a daily dark period for the chicks. A light/dark cycle is vital for all earth bound creatures' circadian well being. I then switched out all the red lamps with ceramic heat...
You clearly gave it the old college try, learning before buying.
The learning curve isn't nearly as steep for those of us who grew up on farms with all manner of livestock. Even though chicken husbandry is second nature, I'm constantly learning. I've been teaching poultry classes for almost 10...
Chicks are incredibly durable and precocious. They don't need all the ambient air to be warm. They need a warm space and lots of cool space so they can find their comfort zone. They also need extreme ventilation. If they don't have lots of fresh air, respiratory issues can arise.