LEDs that have 3-in-1 RGB capability where each is driven independantly of the other usually contain three seperate LEDs in a single package. Each of them is made using different material to get different light color. I see that this has two implications:
- The forward voltage for each color LED inside may be different.
- On the LEDs I have seen on the RS website, they always seem to have different luminousity per color. I assume this means that with same forward current per color, each color will have different luminousity.
The result is that using the same circuit for each color one will get different light intensity for each color, this will make color mixing more complex. Why are the LEDs not made to have same light intensity per LED and (always) with same forward voltage per LED inside the package?