https://www.amazon.com/Nestling-Solarstorm-Bicycle-headlamp-4x18650/dp/B00VHLTQ6A/ref=cm_sw_em_r_asp_p_VLkqL.NTCYK6E_tt

I know this type light has been mentioned already, for $27 and change shipped its not bad. Light and battery pack seem fine. One ride so far of 45 minutes with a mixture of low, med, and high, and still 3 leds of battery if its correct.

On high taken with S5. Its brighter in actuality.