Using old tubes in tube amps

[I_M_Ken]

Hi guys, I have a quick question about Tubes.
I have a set of Sovtek 6L6 tubes, never used. But I got them approximately 8 years ago and found them when I was clearing out my room.

Can i still use those tubes? or are they probably not usable anymore?

Looking to purchase a tube amp and using these if possible.

Thanks,
Ken