Relay timing

Hi, i have a question about relays, i've calculated that a type of relay need 5 ms to swich to power on a led. But it also need 5 ms to power off it. Why?

Inertia of the mechanical parts and the inductive storage capacity of the coil.

Yaro:
Hi, i have a question about relays, i've calculated that a type of relay need 5 ms to swich to power on a led. But it also need 5 ms to power off it. Why?

Because its a fast relay?

Expect most relays to be a lot slower than that, they are mechanical devices.