On Sat, 11 Feb 2017 06:22:07 -0800 (PST),
wrote:

*extra* low voltage ? :-)

That'll be a right bugger for theatres and sports stadia.

Sports stadia, yeah. At EPL stadiums each luminaire is 2 kW so that's
40A @ 50 V and there are around 200 of these luminairs... For top
flight Champions League or FIFA matches the lights must not go out,
full stop. Stadiums these days have twinset on site generation which
is hot from about three hours before kick off.

Any club with any sense has those sets available to the grid under
STOR. They are only needed for their primary purpose for 6 hours
every week or so...

--
Cheers
Dave.