| 摘要 |
A portable electric light comprising a housing, a source of electric power, and having one or more LEDs with high internal resistance as a light source in which the manufacturer's stated maximum voltage or current levels are overrun, without the LED failing or its working life being substantially reduced, and making the LED capable of emitting far more light than is conventional. The threshold voltage of the LED used, below which very little light is emitted, is 3 volts or higher. The light may be in the form of a hand-held torch running from D.C. electric power. |
