Huge celebration lamp is a lamp that can be won on Treasure Hunter. It gives experience equal to a huge prismatic lamp, plus 5% of the experience provided to the selected skill in all other skills, with elite skills being scaled as usual but not suffering from the 50% reduction. This means that the higher the skill you select, the more experience all of your other skills will get. Every 10 lamps boost the experience gained by 2% more, up to a max of 20% global and 10% for the selected skill. It is destroyed after rubbing.
Additionally, players can inspect the lamp to toggle on getting experience in combat skills. This is toggled off by default.