CJT wrote:
Stormin Mormon wrote:

Do the transformers supply AC or DC for the 12 volt power?

That seems an odd way to pose such a question. A transformer without
more will _always_ provide AC. Provision of DC requires what I would
call a power supply, rather than a transformer.

Rarely would one go to the trouble to provide DC for lighting -- what's
the benefit?

Hmmm,
DC? Forgot about Edison vs. Tesla?