Some interesting threads:
https://budgetlightforum.com/t/-/2218
https://budgetlightforum.com/t/-/28621
https://budgetlightforum.com/t/-/30073
In case interest in 365nm, KD’s 365nm 18650 , KD’s 365nm 14500 . As discussed in threads, may be not as good as IOS’s 365nm or more expensive one like LedEngin or Nichia.