The marble burners can be built in the Lamp space of the Chapel in a player-owned house. It requires 69 Construction to build and when built, it gives 1,600 experience. The player must have a hammer and a saw in their inventory to build it.
Marble burners improve Prayer experience gained when using bones with the Gilded altar, one lit burner giving 300% normal Prayer experience while 350% is gained with two burners lit. The player must have a marrentill herb and a tinderbox to light a burner.
The duration in which burners stay lit are random and depend on the player's Firemaking level. The duration is ticks, in which is a random number between 0 and .
- At level 50, a burner would last between 250 and 299 ticks (150-179 seconds).
- At level 85, a burner would last between 285 and 369 ticks (171-221 seconds).
- At level 99, a burner would last between 299 and 397 ticks (179-238 seconds).
Burners will not stay lit when all players have left the house. However, if there are other players in the house when the owner leaves through the entrance portal; they will stay lit as long as the owner returns to the house within 5 seconds.
- ↑ Jagex. Mod Ash's Twitter account. 16 October 2018. (Archived from the original on 28 May 2020.) Mod Ash: "200 cycles + your FM level + random number between 0 and your FM level, inclusive of 0 but not inclusive of your FM level. Really.
So at level 70 that'd be 200 + 70 + (random number 0-69 inclusive), i.e. between 270 and 339."