LEDs are a form of solid-state lighting. A typical LED light comprises of a small piece of semiconductor, an integrated optical lens to shape its radiation pattern, and a heat sink to dissipate heat and keep the semiconductor at low operating temperature. LED lights present many advantages over incandescent light sources, including lower energy consumption, longer lifetime, improved physical robustness, smaller size and faster switching. Used effectively, LED lights are powerful enough for room and street lighting. However, they're relatively expensive and require more precise heat and current management than traditional incandescent and compact fluorescent lamp sources of comparable output.
展开▼
