Light emitting diode (LED) lighting is a promising artificial light source that is getting more attention for indoor plant cultivation. This is because the LED lighting can provide advantages including lower energy consumption, less heat generation and least insecticide used as compared to the conventional lighting, such as vapor sodium, metal halide or fluorescent lamp. Overall, the LEDs can be grouped into low power LED with current rating ranging from 1 to 20 mA, medium power LED with current rating around 100 mA and high power LED with current rating from hundreds of mA to more than an ampere