LEDs don't require periodic bulb replacement like incandescent and are virtually indestructible. Stream lights revolutionary C4 technology combined with an innovative Stream light-engineered reflector provides sharp, focused light that rivals incandescent intensity without giving up the durability and longevity of an LED. Since LEDs have a long life and won't burn out or won't break, they never need to be replaced. Your light will always be ready when you need it. More powerful and more economical, Stream light rechargeable LED lighting tools pack a lot more power with ultra-bright white beams and long illumination times. They are extremely dependable and cost-efficient. A hands-free working situation is much more productive, not to mention safer. No need to juggle while you work to complete a task with 1-hand while holding your flashlight in the other. Hands-free lighting tools are used wherever there is a need to use both hands (i.e. automotive, utility, electrical, firefighting, confined space or maintenance activities, among other situations). The Knucklehead features a removable magnet and stow able hook to ensure a safer, hands-free, more productive workplace by allowing the user to attach it to a metal surface (such as the hood of a car or hang it to use as a drop light) It can also stand on its own or be laid on its side and with a 210 articulating head that rotates 360?? you can direct the light where you need it.