Yes, they contribute to energy use and waste, as all electronics do.
> Most consumer-grade RGB LED strips are not repairable: one dead pixel often ruins the whole strip.
Well, this depends on what you mean by "repairable". If you have access to the strip itself, it can probably be repaired. Worst case, you can cut out the section with the bad LED (on the marked cut lines) and solder the remaining two sections together or replace the removed section with a new one. In some circumstances, you can even just use bodge wires to bypass the dead LED.
> Could we design these systems to sleep deeply when idle, or use local sensors to avoid unnecessary illumination?
Absolutely. I have a display case for my electronics projects that is lit with LED strips. There's also a proximity detector so that the LEDs only light when someone is in front of the case. The microprocessor running the thing spends most of its time in deep sleep, just waking up every so often to check if someone is present.
> Or is the energy impact so small that it’s not worth worrying about?
I don't personally think this is true. All energy usage is worth worrying about, and things like LEDs -- where you're often running hundreds of them at a time -- can be deceptively hungry in the aggregate.
Yes, they contribute to energy use and waste, as all electronics do.
> Most consumer-grade RGB LED strips are not repairable: one dead pixel often ruins the whole strip.
Well, this depends on what you mean by "repairable". If you have access to the strip itself, it can probably be repaired. Worst case, you can cut out the section with the bad LED (on the marked cut lines) and solder the remaining two sections together or replace the removed section with a new one. In some circumstances, you can even just use bodge wires to bypass the dead LED.
> Could we design these systems to sleep deeply when idle, or use local sensors to avoid unnecessary illumination?
Absolutely. I have a display case for my electronics projects that is lit with LED strips. There's also a proximity detector so that the LEDs only light when someone is in front of the case. The microprocessor running the thing spends most of its time in deep sleep, just waking up every so often to check if someone is present.
> Or is the energy impact so small that it’s not worth worrying about?
I don't personally think this is true. All energy usage is worth worrying about, and things like LEDs -- where you're often running hundreds of them at a time -- can be deceptively hungry in the aggregate.