"I feel really stupid for admitting this, but I have not yet managed to light a torch in this game. frown The only thing they appear good for is as a really bad club. confused"
Equip the torch in the main hand, than use the "dip weapon" on fire surface or other torch. Was a hard time for me to figure this out tho. note: can't dip if it's equipped in the offhand, but once it's lighted you can use it in the offhand, even you can put it back to inventory, and equip later it will be still lighted