The LEDs are high-efficiency parts but any standard LED will suffice.
The resistors are 1K2 ohms (brown red red gold = 1,200 ohms).
Your LEDs may require a different resistor value.
Note: A very fine wire was used for the return to ground so it is almost invisibile in the photos.
Note: The ADU200 shown is a pre-production prototype with a beige base
and a windowed cerdip processor chip.