It's definitely not a heat issue and could be strain dependent. The thermometer at the canopy never gets over 80. It usually reads between 70-75. There are 2 strains in there: 3 "White Widow" and the other 2 are "Northern lights x Big bud" I put em in quotes because the strains can not be verified. All i have to go on is what the guy said when I got their moms as clones. The last batch of NL X BB finished in under 50 days which was surprising. The Widow took about a week longer. I dunno, but thank you for the comments and I'll check out those posts you refer to and I will post more pics every week until harvest for sure.