Review on 🚲 TANSOREN 4000 Lumens Waterproof LED Bike Headlight - High Brightness for Enhanced Visibility by Christopher Shah

I use it on my bike for night riding. I have two headlights next to each other. One aims at distance, the other at closeness. The specification of 4000 lumens is incorrect. I don't own a lumen meter, but I do own a sporting goods store that sells quality flashlights and I'm good with lumens. I would rate this light at 1500-1800 lumens. The color temperature is about 2500-4000K. The included battery lasts three hours after a full charge. If the light gets too hot, the brightness level will decrease. In fact, driving probably won't be a problem since you'll have airflow over the headlight. I tested in my house. I retested a small fan blowing around the light to get a 3 hour run time. I use a different battery holder that holds 4 x 3500mAh 18650 batteries. This took 5 hours and 20 minutes. I use the battery that came with it as a replacement. The supplied battery is welded in and you cannot replace the batteries, you can only charge them. That's why I use a battery holder that allows me to swap out 18650 cells to have an almost infinite supply. The flashlight head is small and fits well on a bike helmet or handlebars. It's easy too. Good light for the money.