I was busy today starting a new job and cooked dinner poorly. But drawing goblins is a way to improve a negative mood.
Being alone is the caves can be a scary place. Goblins carry a brass lamp with a stand to light the tunnels in travel then be stuck into the ground to light their work area. Some goblins get superstitious about leaving their lamps behind, telling that the cave will seek its revenge with out the protection of the candle (which are supposedly enchanted by wizards). Believing in the superstition makes sense due to many goblins hurting themselves by hurting themselves and being found dead later on. So having the lantern keeps 'protect' by lighting their way out at the end of a work day. And no goblin wants to be left behind at the end of the day.