Experience from this lamp is roughly 25% more than the experience of a medium XP lamp in your chosen skill, and roughly 50% of a small XP lamp's experience in the other 4 skills. Parts for all 5 base lamp types are findable while skilling or in combat. While the parts for these lamps are not sellable or tradeable in the normal sense, they were made exchangeable in a face-to-face trade with other players for an equivalent number of lamp parts. To trade them there must be an equal number of lamp parts on both sides of the trade, and no money or other items in the trade at all.