Why does the GL07 step down a few lumens after being used for a while?Updated 6 hours ago

There are two reasons: 

1. Intelligent Overheat Protection

The light will accumulate a lot of heat when used for extended periods. When the light reaches a temperature of 55°C or above, the light will automatically step down a few lumens to reduce the temperature. 

2. Low-voltage Downshift

When the voltage level drops below the preset level, the brightness level decreases correspondingly. When the voltage level drops below 3 V, the light blinks 3 times every 2 minutes to remind users to recharge or replace the battery in a timely manner. 

*This feature only works with a Fenix ARB-L16-800UP rechargeable battery.