Narkush is the first strain that came to mind when I saw this thread title.If I were wanting to go inexpensive on the seeds and get something just to help with sleep I'd look at Seedsman Ata Tundra and Narkush. DNA's Kushberry or Kiwi's Hindu Kush might work but are more expensive. If Ata Tundra and Narkush don't do it probably nothing will.