Hi all, I’ve been looking into new lights recently and thought I’d pass along what I’ve learned.
LED emitters and batteries have evolved a lot since the last thread on the blog. A lithium-ion rechargeable battery called 18650 has the most energy density, it’s a little wider and longer than an AA battery. In the past you needed a separate battery charger, which is a nuisance. They now have 18650 powered lights with micro USB ports, you can charge them from any computer or USB hub. The batteries and the lights have protective circuits that make them totally safe; ignore old stories about 18650 batteries exploding, LOL.
The light output from some USB type18650 lights is almost 1000 lumens, I tried one that totally lit up a huge tree with a broad, white light; it would certainly have lit the Bushy-tailed Possum at the Napa Wildlife Center on one of my trips.
Most all lights have 3-5 light levels which is useful in forests, depending on the situation. Most have memories so the light comes on at the same level you turned it off, not on high every time.
Fenix UC35 is high quality example.
I found a couple red LED headlamps with 100-150 lumens in adjustable steps, haven’t used either but I think the light output would be better than a red filter.
Fenix HP40H LED
H502r Red AA Flood Headlamp
Single 18650s won’t be much use for grasslands or deserts, but there are some 2X, 3X, 4X 18650s that are insanely bright.