The thermometer that's right next to them runs pretty close around 68-72F, obviously varying some day vs. night. They are sitting on heat mats, but I'm not sure how much that helps with 5-gallon buckets. The bell was brought in from outside where it produced pretty well over summer. The serrano was started mid-autum outside then transplanted before frost. It's big and healthy with beautiful green leaves and flowers, just no pods (I think I finally saw one today).
I WANT to avoid putting a space heater there for a variety of reasons. Maybe putting the heat mats on a timer to turn them off overnight will help make slightly bigger temp range.
Or maybe I'm just being too impatient..
This is the new location for my (very late) starters, which will be right next to them. Maybe the heat mats & lights on them will raise the ambient some and might make a difference.