Originally Posted by sgraham602
I use a chest freezer attached to a Johnson Controls analog temperature controller. It works great during the summer when it is warm, but this time of year as it gets cooler there are temperature swings of 5-10 degrees in the freezer at night. I've read of a few options.
1. install a lightbulb (similar to ones used in terrariums) to keep the temperature up and rely solely on the cooler to keep the correct temperature.
2. install a small space heater using the same principle.
3. install a small spacer heater and replace current temp controller with a dual stage controller.
Wondering what everyone else out there does and what will help keep a steady fermentation temp
How are you reading the temperature? If you have a way to immerse a temp probe in a jar of water, I bet you'll find the average temperature does not change all that much--which is what would happen with fermenting carboy as well.
If you decide on the lightbulb idea, check our site for the fermentation chamber build (under DIY equipment) and you'll find pictures on how to enclose the bulb into a pint-sized paint can. You'll still need a way to turn the light on/off as needed though, which there are many ways to do.