Every high-lumen light (except for one with active cooling that appears to be out of production) reduces lumens over time. Magicshine's 12000 model quickly drops to 3500 lumens no matter what setting you choose. This one has a noticeable and sudden drop from 3000+ to 1000 or so if the temperature sensor goes over ~70C (probable if it's mild out and all five LEDs are on high), but otherwise it's well-regulated. I typically use the top 3 LEDs for half-hour trail segments and haven't noticed a drop. It's always the brightest light when the group stops.
Nov. 19, 2024, 8:14 p.m. - Alex D
Every high-lumen light (except for one with active cooling that appears to be out of production) reduces lumens over time. Magicshine's 12000 model quickly drops to 3500 lumens no matter what setting you choose. This one has a noticeable and sudden drop from 3000+ to 1000 or so if the temperature sensor goes over ~70C (probable if it's mild out and all five LEDs are on high), but otherwise it's well-regulated. I typically use the top 3 LEDs for half-hour trail segments and haven't noticed a drop. It's always the brightest light when the group stops.