High-power LEDs (HP-LEDs) or high-output LEDs (HO-LEDs) can be driven at currents from hundreds of mA to more than an ampere, compared with the tens of mA for other LEDs. Some can emit over a thousand lumens. LED power densities up to 300 W/cm2 have been achieved. Since overheating is destructive, the HP-LEDs must be mounted on a heat sink to allow for heat dissipation. If the heat from a HP-LED is not removed, the device will fail in seconds. One HP-LED can often replace an incandescent bulb in a flashlight, or be set in an array to form a powerful LED lamp. COUNT 5
QSN1 How many lumens can some high-power LEDs emit? ANS1 over a thousand QSN2 Up to how many densities have been achieved with LED power? ANS2 300 W/cm2 QSN3 Why must High-power LEDs be mounted on a heat sink? ANS3 to allow for heat dissipation QSN4 What will happen if the heat from a high-power LED is not removed? ANS4 the device will fail in seconds QSN5 What can one high-power LED replace? ANS5 incandescent bulb in a flashlight