“252455615968443048” is a sculptural mirror/lamp and a representation of a time when the sun dies. It represents the red giant phase, and it will last about a billion years before the sun collapses into a white dwarf. Astronomers estimate that the sun has about 7 to 8 billion years (252455615968443048 seconds) left before it sputters and dies. Humanity may be long gone by then, or perhaps we will have already colonized another planet.
The object degrades over time just like the sun. It makes the spectator aware of the fact that we have to live our lives to the fullest because every second counts.