Those appear to be bulbs for **projectors** ... as in "Slide Projector" or
only two clicks from there to daylight bulbs.
GE makes that bulb in many different wattages.
here is a link (as an example)
that breaks out all the wattages and if there is photo bulbs available.
I am in no way endorsing this company.. simply using thier page as an
of bulbs available.