Lamp

The  Lamp is a reward from the  random event gift and cannot be traded or  banked. Rubbing the lamp gives the option of adding  experience to a skill of your choice. The amount given is your current level in the skill multiplied by ten (e.g. level 13  Attack increases by 130 experience). This is not considered a large reward by most players, unless it is being used to level up skills that are time consuming or expensive to level up, such as Prayer and  Construction. However, people usually choose a lamp from the random event gift, as they feel that experience is more worthwhile than any other reward in the box.

Using the lamp
Genie lamps are most commonly used by players to advance skills that are either low or considered hard to level. Combat skills are seen as a poor use of the lamp, unless one is a  Combat pure, as lamps allow pures to gain  Combatexperience without training  Constitution. Skillers often use lamps to train Slayer without raising their combat. Sometimes, a player may hold onto the lamp until they gain a level, especially if they are close to one. This is because it will give slightly more experience (10 more per increase) at a higher level. However, retaining the lamp will take up inventory space, as it cannot be banked, and this can be counterproductive when training some skills.

Another common reason for a player keeping a lamp would be for the ease of reaching celebrated levels like a 99. This makes the level-up significantly easier and allows the player to have a much wider choice of level-up locations. An example might be a player achieving 99 slayer in their player-owned house by using the lamp to obtain the final experience required to level.

Trivia

 * It would take exactly 15,057 genie lamps to level a skill from level 1 to 99.
 * Level 10 experience of 100 gives the highest percentage (49%) of the difference to the next level. The levels 5 to 18 give 40% or more, levels 4 to 23 give 30% or more, levels 2 to 30 give 20% or more and levels 1 to 40 give 10% or more.
 * When trying to bank a lamp it will say "A magical force prevents you from banking this item", and the lamp will stay in your inventory.
 * When a new skill is added, there is no option to receive XP from the Lamp until two weeks after the release.