I didn't brumate mine last year per say, I just didn't provide heat. I live in Texas, so it might be below freezing one day and well above 80 the next. I kept them in the house in a room with the heat vent closed off. They probably averaged 55-70 all winter. I had 3 pairs, they all bred, and had a very good hatch rate. 100% on my reds and bananas, and 7 out of 11 on my ws.