Sharp bz23 tuner indicator bulb

[Danndad]

Can anyone tell me the ma rating for the tuner indicator bulbs on this sharp bz23 please?
They are on the out put pair collector so I would imagine they would be 6v, I enclose a snippet of the sheet.    

[PerdioPal]

There is no limit to the current available (bar battery considerations) it is a 6V supply and two in series I would use 3.5V torch bulbs with the lowest current rating available. The lowest I could find was 100mA, time for a LED upgrade I think. They are only pilot lamps and don't do anything except light up, do you really need them and the battery drain?

[Mike Watterson]

6V torch bulbs are really about 4V. The 6.3V panel lamps are closer to 9V torch lamp.

Torch bulbs are designed for high output/efficiency and thus short life. Panel indicators / lamps / bulbs look much more orange as they are for x10 to x50 service life of a torch bulb.

[Danndad]

I did try an LED with various values of resistor in parallel and series but to no avail, it either stayed on or didn't come on at all so gave up on that idea....
I posted in the hope that someone may have had some spec that I couldn't find.