Radio Shack 276-036 used for a electronic flasher/strobe circuits for use in a caboose
The Radio Shack LED operates on any voltage from 1.4 to 3 volts dc. Two AA batteries are usable for power.
Radio Shack part:
Model: 276-036
Catalog #: 2760036
5MM RED BLINKING LED
Size is T-1 3/4 or 5mm
Red lens color
Viewing angle is 30°
90mA (max)
Typical Voltage is 2.25, with a maximum voltage of 2.6V