I expected CriticalKush to be great for sleep, but it wasn't.@Simplicio , Just seeing your post and having grown several strains specifically for extraction focusing on sleep, none of those would likely be lights out. Mephisto’s 24 Ct may be helpful as Bluetoof and Gold Glue are no longer available.The Sam’s Crack, given out as a freebie, might also be a good choice. Always questing!
I expected DoubleGrape (60% indica) to work exactly as it did, and I had leftovers from other sleepy strains.
The other 2 were sativa dom for friends.
The sleepiest strains I've found so far are
Dinafem BubbaKush
GrowersChoice CriticalPurple
Mephisto 24Carat
Mephisto Skywalker (only 65% indica)
Mephisto Creme de la Chem (70% indica)
Mephisto StrawberryNuggets (85% indica, my favorite)
Some of the other Mephisto indica dominant strains didn't work as well as hoped for sleep for me, including
SourCrack, ToofDecay, WhiteCrack, SourLivers, which work about as well for sleep as DoubleGrape.
For me, THC is sleepy stuff, and even sativas work for sleep, but not as well.