The cost
would be a bit steep as well, since the light bulbs are over
$10/ea, and just
for 2 digits it would cost $140. A full digital clock (assuming a 24hour
display) would cost over $280 just for the tubes. It would be
impressive (a
nice large display) for the "war room" clock display. The
incandecent lights
would be easier to control and be a nice to control.
You might like to look at the LED "equivalent" (eg eBay lot 220034483745) -
still quite expensive but probably easier to drive and available in various
colours and sizes.
Andy