Just memory (no link): the C01R had another driver to match the low Vf of the red led.
Convoy sells a dedicated driver for a red led (Vf: 2.0V-2.5V).
On the subject of the low perceived output of the 660nm led: this LINK
Just memory (no link): the C01R had another driver to match the low Vf of the red led.
Convoy sells a dedicated driver for a red led (Vf: 2.0V-2.5V).
On the subject of the low perceived output of the 660nm led: this LINK