Sealed containers with H2O holds a large amount of thermal energy to be released at night without adding humidity. Also insulate your grow room and turn off venting/intake at light off to hold in heat. You can run your grow light at night and off in the day to offset temps, most people do this already but just in case you're notWouldn't that add moisture? Or I guess it should work with lids on as well, problem solved. Interesting direction though. Could solve this by adding something to the room that will absorb alot of heat. Thx man, full of ideas!
Would love to grow just one plant each area though it would take a while me being me.