This general purpose two-transistor complementary configuration was found in the December 1972 issue of Radio Electronics magazine. The power supply is between 6 and 12 V.
We found this circuit in a technical documentation on the National Semiconductor LM3909. The...
The LEDs act as diodes, so if good they will show the same characteristic curve. Arrangment shown...
This circuit is from an old English publication from 1968. We can implement it with TIP32...