Mine was under an stc.

Viperdoc wrote:

Were these STC's installations, or did you need to get a field approval?
I've been waiting six months for the STC to get signed by the FAA regional
office in Chicago. Since the wing lights are the same for a lot of already
approved Beech products, it is amazing how long it is taking them to sign
the paperwork (for a Baron).

If the field approval wasn't too bad, I may decide to go that route rather
than wait for the STC.