The materials originally used to craft the dwarf-lamps have long since been used up. More must be found if the halls of Moria are to shine once more.
'The goblins keep smashing the dwarf-lamps. Without them, we cannot safely find our way through the halls and move supplies between the camps we have established throughout Khazad-dûm.
'We either have to find more materials to craft more lamps or find a replacement. The latter may be easier, now that I think of it. I believe we can use bits of glass-spider legs to replace the crystals. In order to do this, though, I will need a great many of those legs.
'If you would, go out and hunt down some glass-spiders and bring me their legs. You can find a good many of the beasts to the west, near The Lost Palace.'
Glass-spiders can be found to the west of the Rotting Cellar, near The Lost Palace.
Thrand wishes to repair some of the dwarf-lamps smashed by the goblins and speculates that glass-spider legs will make the best replacements for the crystals.
Thrand is in the Rotting Cellar, east of The Lost Palace.
Thrand will be delighted to see the condition of the glass-spider legs you collected.