ive found that although cold temps increase resin cold temps also drasticly reduce yields.strainwhore said:Actually there has been a lot of study done on the "differential" or the dif. Keeping the temps as close as possible day and night will keep your internodes shorter, the plants generally yield more, less stress, etc. But there was an article in high times (or similar publication) that talked about actually raising the temperature before the lights came on and dropping it before the lights went off? Even shorter internodes, better yields.
Of course, if you are growing GrandDaddy Green, then you want your night temperatures at or below freezing, otherwise that whore won't turn purple.
Good luck!
oh..."the fuzzy" thoes things r the best!snadge said:Hi digitalhippy, the sentinel controls the ppm using fuzzy logic on bottled CO2, it has a photoelectric cell that shuts off CO2 in the night cycle. :smile: