Hi, Castor

May be there would be a smart turnaround ...

if , instead of R1, you use a constant current generator ...

say a PNP trans, with a red led between VCC and base, a resistor between emitter and VCC to fix your current ...
and another resistor between base and GND to allow, say, 1 mA into the led + trans base.

good idea, no ???

Alain