I'm brewing my first batch after taking a 15 year hiatus from homebrewing. I fermented in a plastic bucket for a week and nailed the hydrometer OG and FG that the recipe called for. Now I'm moving it to a glass carboy secondary ferment. I did the primary fermentation outside using a trash-can water bath and an aquarium heater to hold the temperature at 70F. Question is, do I also need to hold the secondary fermentation at the same temperature or can I let it sit unheated at an ambient outside temperature of ~50F? From what I've read, secondary fermentation isn't real fermentation anyway, so colder may be okay. I'm doing a simple amber ale, not a lager or anything fancy.