How do you get the lamp in the haunted house in poptropica?

Answer 1

You have to synchronize (match the times) on the two skeleton clocks, by clicking on either one to speed it up. (You actually only have to place your mourse cursor over one clock or the other.)

In detail :

In the third floor bedroom (left) there are two clocks on the mantelpiece. They are spinning separately, and every time one of them hits midnight (both hands straight up), a skeleton springs out. According to the ghostly telephone in the room, the "light" will be revealed when the two clocks strike midnight at the SAME time.

To get this to happen, you have to speed up one of the clocks by clicking on it, and then (if the midnights don't happen at about the same time) click on the other to speed it up. The problem is that the clocks continue to spin faster for awhile after you click, so timing the midnights is difficult. The best chance for success is to let one spin slowly, and when it gets close enough to 12 midnight, race the other one to catch it.

This is time-consuming but eventually the clocks hit 12 closely enough and they stop, revealing the LANTERN in the fireplace below. (Although you have the lantern, you still need to go to the basement to add kerosene to it.)