The mining helmet is a light source that can be dropped by level 11 Cave goblin miners, obtained from chests in Dorgesh-Kaan, or bought at Miltog's Lamps in the Dorgesh-Kaan marketplace. Players must have completed the Lost Tribe quest to obtain it, but the quest is not required to equip it.
If the player has completed the Lost Tribe, one is given by Mistag the first time the player shows him a brooch.
This is extremely useful for going into dark places as it does not take up an inventory space, and because they do not go out on their own, a tinderbox is not needed. However, the Seer's headband is by far preferable as it does not need to be lit and cannot go out under any circumstances. Level 65 Firemaking is needed to light the mining helmet. Lighting it will make a lit mining helmet.