[Renate]

The LM3630A is logarithmically controlled so there is plenty of range. Your eye is also logarithmic. Sunlight is about 10,000 brighter than moonlight, but you can read a paper book by good moonlight. The problem is mostly the step from off to minimum brightness built into the user interface. I find the maximum brightness on most devices absurd.

The logartihmic step is 1.028 brightness. You can barely see that even if it switches up and down while you're looking at it. That's in a range of 0-255. Most software reduces that to 0-100% as an integer which is already throwing away resolution. The inherent range of brightness of the chip is about 1240.

Originally Onyx had a two slider control but it was for warm LED and cold LED. It was impossible to control brightness and get the color temperature right. I wrote an app also with two sliders for brightness and color temp. Since then, Onyx got its act together and I haven't used that app.

So here's my Go6 at 5% brightness. It's not really bright enough for the camera on my phone to focus.