These are personal protective and safety equipment to assist a person in seeing in low and no light conditions. There are several reasons LED are used. One of them is because of their efficient use of power from a limited source. This makes it possible for the batteries to be small while still supplying the required amount for the light to have a reasonable life time. Depending on the size and number of LEDs being used in the lamp, the small disk lithium batteries could be the power sour …