The most energy efficient kind of light emitting semiconductor junction is the one that emits blue light.
This being a battery bank and assuming that 2x7 segment LED display is always ON, maybe the choice of color for it was driven by that (and price, since that numerical display is far cheaper than even lower power solutions like e-ink) above usability.
The most energy efficient kind of light emitting semiconductor junction is the one that emits blue light.
This being a battery bank and assuming that 2x7 segment LED display is always ON, maybe the choice of color for it was driven by that (and price, since that numerical display is far cheaper than even lower power solutions like e-ink) above usability.
Exactly, blue LEDs are cheaper. So, shove them in everything, even if another color or no light at all makes more sense.