Rechargeable: Many of these front bike lights feature either charging capabilities through USB, or swappable rechargeable batteries, meaning that you can swap out your battery on the fly, or easily recharge when you arrive home simply by plugging the light in via USB. This is not essential, but can be incredibly useful for any rider that is riding for extended periods of time, or regularly. You can easily keep a spare rechargeable battery in your bag, and swap it out when the light dies, when you arrive home, you can charge both batteries, or even the light itself simply through USB.
Waterproof: A lot of these lights are water and dust resistant, meaning that whatever tasks you throw at it, it can handle, no matter how harsh the environment or intense the task. With these front bike lights, you will be able to ride through any environment or landscape, fully confident in the dependability and reliability of the quality of your front bike light.
Weight: As these lights have been designed to be attached to the front handlebars of your bike, they are required to be lightweight, but sturdily built. The front handlebars absorb a large amount of any impact that the bike takes. This means that anything attached to it needs to be lightweight, and securely attached so that the light will not be knocked from its attachment point or fall off of the handlebars.
Battery life: These lights are designed with the hard task of balancing a dependable battery life, with a lightweight yet sturdy build quality. The lights can generally last a good few hours on a constant high setting, meaning that you will have no problem getting through your day, especially if you recharge when you return home, or carry a spare battery that you can swap out.