Irr-lumination Lamp and lava rock re-smelting

[lordgrunt]

could scratch out irrlantern completely in favor of this item (no one uses it), but could be also added on side.
Recipe: wrought iron x2, glass panes x6, bucket of hot lava and 1 irrlight. could be hanged from same two stands lantern uses.
While wax filled lantern burn for 2 weeks, I'd ask for infinite time but i doubt it would pass, so lets say two months? And asking people to travel the world to gather lava is too much, despite the time I ask for, it wouldn't be fair to the people actually playing long term, i.e. hermits.
Instead, allow to re-smelt lava stone gained from cooling barrels of lava, use that stone in smelter, same time as ore, so say, 12 coal. lava stones smelted same way as mercury ore, and gathered as such, but with success rate that of peacock, lets not be too stingy, its not ore, just a stone needing melting. some slag would be produced but not much.