Its a tad bit annoying. Id like to be able to set it to a value less than an hour, but it can cap out at an hour. However, regardless of the value I set, it always sets it self to 1 hour.
This makes it harder to rely on it for cleanup, especially when one disconnects, or crashes or teleports away, after which script control is lost.
This also which also explains why the flares were sticking around in the sandbox last week, which I though was caused by the rapid editEntity calls I was calling.