The moisture sensor in practice
On a pre-dawn hike in light rain on the AT, the lamp switched to flood mode automatically about 15 minutes in when the rain started. The path was clearly lit and there was no reflection glare. That's a small quality-of-life improvement that adds up over a lot of early mornings.
For hiking without any precipitation, the spot/flood toggle is a standard two-mode system controlled by a single button. The button interface is simple enough to use with one hand, which is important when you're adjusting settings with a pack on.
Battery life at real brightness
BioLite rates 40 hours on low. At mid-brightness (the realistic hiking setting, around 200–300 lumens), real-world runtime is 8–10 hours between charges. For a weekend trip covering morning approaches and evening camp use, that runtime is sufficient without recharging. USB-C charges fully in about 2 hours.