Power LEDs with 50 lumens total flux, neutral color temperature Three light modes: Turbo (50 lumens); Normal (25 lumens); Low (2 lumens) 360 degree ambient wide-angle spread 5 year lifetime, 425mAh, 3.3 volt, lithium ferro-phosphate (LiFePO4) battery 0.35 watt, integrated polycrystalline solar panel Up to 72 hours of run time on a day’s charge LED charging indicator displays charging effectiveness on a scale of 1 to 5 to help optimize panel placement LED battery indicator displays battery power remaining Active battery management automatically switches to low power when battery is running low, giving user 5 hours of additional light