I have been dealing with this routine for years now. I do know that irregular sleep patterns can weigh on a person after a while. In most situations, I can sit here and vape on med temps (HI set to 12.1v, cloud set to noon etc...) and not go back to sleep for hours, but will eventually get tired in the early evening, usually around 5pm I will need to power down for a bit, maybe take a nap for an hour or so. Then I will likely wake up groggy for the evening. It's become a pattern that I deal with. Needless to say, I don't work a regular work week anymore. Unfortunately, right now I have limited access to a variety of herbs. I have one strain that seems to help my pain issues with out making me too wiggy (some kind of berry kush cross), and recently discovered that some sativa strains actually amp me up and can make me a little too edgy and weird, anxiety ridden. So I have backed off using sativa unless I am very careful not to take too much in. I might take a hit or two of sativa for a pick me up. I am actively seeking a better or stronger indica strain to help me with the wee hour wake up. Sometimes I can get back to sleep for a bit if I can vape a few hits of a strong indica, and I also agree the higher temps will hit you much harder, and give you more of a full spectrum of cannabanoids. When I am stuck with only one strain for a length of time, I will use temp to create the variation so the late night higher temp vaping makes me feel more tired, and day use, I try to keep it in the lower-med temp range so I don't get too blasted as my day goes by. I have also been turning down pills, used to use Soma to help me relax and sleep, and that was creating it's own issues too, so I have gotten to the point that most medications just don't work too well for me anymore, they tend to just make me feel sick. Pain pills esp. don't work for me anymore. I can not handle the opiates on any kind of regular basis. I sure hope we can get this legalizing thing over with soon, as cannabis seems to be my cure all, and I don't want to resort to other alternatives unless it is absolutely necessary. Sorry pill doctors.