With Wurkkos starting to main stream lights with aux LEDs, it seems like there isn’t enough general scrutiny and awareness on aux LED current consumption. Aux LEDs are kind of a bling feature, but it has an impact on how much you have to babysit the light, and which aux mode you can safely use. In general, I wish reviews of lights w/ aux include:
- how much current aux LEDs consume
- time averaged current at different modes of aux LED bright/dim/blinking
- time averaged current with different colors of aux LEDs
- aux consumption relative to idle (off) consumption (parasitic drain)
- is LVP present for all aux modes? Some aux modes? None of the aux modes?
I’ve not seen a single review of lights with aux that really addresses these specs, even on detailed enthusiast light reviews. I might chose not to use certain colors of aux LEDs if they consume too much current and would require too much babysitting. Having too many lights with aux might mean you have to mechanically lock some of your lights because you just don’t maintain the battery on so many high-maintenance lights. But the information needs to be out there to make those decisions. If your answer to high aux current is to just lock out the light, then why get a light with aux in the first place?
Heck, some lights just have straight up flawed aux led implementations because it’s just too high current when it’s in the +12mA range and don’t have LVP on the aux (looking at you TS10!). Speaking of the TS10 - so many people love it because it’s an affordable light that comes in fun colors and bodies. But the toxic combination of low price, high aux current, LVP bug, and low capacity battery format really makes me wonder if everyone fawning over it understands this when they’re buying multiples of them in different color/host combinations.
I certainly don’t think of myself as super educated about the technical aspects of lights, but I feel like there’s a big gap between knowledge and enthusiasm with aux leds. There’s too much enthusiasm and not enough scrutiny, and manufacturers are bringing the bling without putting the necessary engineering to make these aux features practical. These issues also apply to indicator LEDs, but at least indicator LEDs have less room to go very wrong and there’s just a ceiling to how enthusiastic one can get about indicator LEDs.
Here’s some lights with measurements I made. Current measured at 3.6V unless otherwise stated. The D4K is my first and only light with aux LEDs, but I measure my other lights with indicator LEDs because that’s interesting info for much the same reason.
D4K (boost driver, blue indicator, RGB aux)
- Off: 64uA
- low (blue): 101uA
- high (blue): 818uA
- high (green): 820uA
- high (orange, red/green): 4.05mA;
- high (red bright): 3.58mA;
- blink (blue): 112uA; note 1.1mA peaks
- blink (orange using red/green): 290uA; note: 5mA peaks
- blink (bright red): 260uA: note 4.5mA peaks
- LVP: works for all modes (blink, low, and high), set at 2.8V
ArmyTek Wizard indicator current drain
- Blinking = 35uA
Sofirn BLF SP36 indicator current drain
- Off = 136 uA
- Dim = 186 uA
- Blinking = 320 uA
- Bright= 3.06 mA!
- LVP on indicator set to blinking: 3.0V
- No LVP on indicator set to bright or low
TS21 indicator current drain
- Off: 75uA average
- Dim: 197 uA average
- Blinking: 184uA average
- Bright: 1.48mA
- No LVP on indicator when set to bright.
- No LVP on dim.
- LVP on indicator set to blinking, 2.90V
TS25 (Production version as of 2022-11-15)
- Off: 87uA
- Blue Low: 131uA
- Blue High: 3.2mA
- Blue Blink: 257uA
- Red Low: 206uA
- Red High: 6.25mA
- Red Blink: 450uA
- Green Low: 213uA
- Green High: 2.1mA
- Green Blink: 164uA
- LVP of 2.8V works at all levels (low, high, blink)
SP10pro: No aux, no indicator
- -AA (1.3V):
- Idle = 45uA
- Moonlight = 3.5mA
- -Li-Ion (3.6V):
- Idle = 54uA
- Moonlight = 1.38mA
Wurkkos FC13
- Indicator Off = 63uA
- Blue Button Indicator, low steady = 106uA, good brightness level.
- Blue Button Indicator, high steady = 3.39mA
- Blue Button Indicator, blink = 246uA
- Red Button Indicator, low steady = 185uA, but too dim to be useful
- Red Button Indicator, high steady = 6.3mA
- Red Button Indicator, blink = 433uA
- Green Button Indicator, low steady = 140uA, good brightness
- Rainbow Button Indicator, low rainbow = 181uA
- Rainbow Button Indicator, high rainbow = 5.8mA
- LVP for high and blinking mode kicks in at about 2.7V, consuming 40uA when LVP cuts off indicator light.
As a side note, LEDs are so bright now that I don’t really even consider the lumen output of new lights. But man would I love a comparison of different LED indicator brightnesses. I love indicator lights as much as one can love them. But they need more scrutiny. Where are the specs on indicator lumens and CRI!