If you’re using the default config and you’re in stepped ramping mode, or in simple mode, the bottom step is level 10 of 150. Try switching to the smooth ramp in advanced mode to go lower.
The ramp has 150 levels. The driver hardware has 3 “gears”, like the low/med/high gears on a bicycle or car, for different power ranges. The ramp is divided among gears like this…
- 1 to 5: low gear
- 6 to 50: medium gear
- 51 to 150 high gear
So if you’re at level 10/150, the bottom default step in stepped ramp mode, you’re not even in low gear.
Internally, those 150 ramp levels control the power for each gear. If I recall correctly, the top of low “gear” is about 0.01 lm or so… and it has 2500 different internal power values per gear. The bottom 5 ramp levels use these internal power values:
- 1/150 = 100 / 2500 * low gear
- 2/150 = 359 / 2500 * low gear
- 3/150 = 790 / 2500 * low gear
- 4/150 = 1436 / 2500 * low gear
- 5/150 = 2500 / 2500 * low gear
So the lowest ramp level is about 1/25th of the 0.01 lm brightness the low gear can produce. In a perfect circuit, that would make it about 0.0004 lm. And if you reflash it with a different ramp table, the driver can still go 100X lower than that… like 0.000004 lm. That’s four millionths of a lumen.
That’s for a perfect circuit though. In practice, individual torches have different brightness levels at the bottom of their range, because the components involved simply aren’t precise enough to be accurate to within millionths of a lumen.
So on one light I tried, the lowest ramp level was like 0.0001 lm… and on another it was more like 0.005 lm.
Either way, it’s really, really low. And the driver is capable of going even lower (by two orders of magnitude)… but I didn’t enable anything lower by default because it seemed a bit pointless. I like low modes… but damn. Loneoceans really overengineered this thing. 