As it is cooling down outside temps in my basement go down as well and are between 10 and 15 C (50 60 F) depending on the furnace activity. All my beers are ferment and carbonate there. The question is what yeast should I use for my beers at this temps. I do not have a special fridge to lager and I usually use 1-2-3 formula for fermenting, conditioning and carbonating beers. I do not make heavy beers most are IPA, ESB and such with OG 1040 1050. I would highly appreciate any feedback.