Review on Bike Light Set - 4200 Lumens, USB Rechargeable Front and Back Bicycle Light, Waterproof Safety Cycling Riding Tailights Flashlight - 5200mAh by Ben Balas

Very good mounting system but lacks a strong magnet mount. I recommend buying this product. This Gyhuego bike light kit, 4200 lumens bright bike light can be used for many purposes. I would like to know how they measured 4200 lumens for the lighting. It doesn't seem any brighter than another brand I own that has fewer lumens. You can wear this light and use it for many functions. I wish it had an on/off holster and magnetic mount. Buy it, you will want to use it everywhere. I am also wondering if Mfg can contact for spare parts. Thanks to Revain, Distributor, Mfg.