These lamps are really interesting. They are all active items, and work in any personal space.
Lamp of Terra: I'm still trying to figure this one out, but when you press play it randomly creates different plant life from the floor any where in the space, and each time you press play it resets it. I placed a few of these in the Chamber Apartment and pressed play on each one and it created quite the jungle. LOL
Lamp of the Inferno: This one is 'hot' and when you press play it surrounds your avi in fire. You'll stay like that until you press play again or leave the space.
Lamp of the Zephyr: This one makes air filled genies pop out and float around the room.
Lamp of the Deluge: This one creates a hard rain throughout the space.
Also, they all take up different amounts of slots. The Deluge takes up 18 slots, the Terra uses 14 slots, while the Inferno only uses 4 and the Zephyr only uses 3.
Also, my friend that was visiting said that only the Inferno lamp would let her use it. The other two gave her a message that only the owner can use it.
There is no on/off indicator, you have to press play to toggle the on or off.