| 摘要 |
In it's simplest form the headlamp consists of a housing in which a row of white LEDs are mounted. A switch is provided and a two pin plug or some other form of connection by which the lamp can be connected to a battery, e.g. 9V battery mounted on the chair. A more complicated design has two rows of LEDS. Provision can be made for operating the lamp in economy mode. |
