Abstract: A light-emitting diode lamp with multi-channel constant-voltage and constant-current control is disclosed. The light-emitting diode lamp includes a constant-current controller, a feedback controller, a constant-voltage controller, a plurality of light-emitting diode apparatuses, a plurality of first feedback components, and a plurality of second feedback components. The constant-current controller, the feedback controller, and the constant-voltage controller are used to process current signals and voltage signals fed back from the light-emitting diode apparatuses to provide an adaptive multi-channel constant-voltage and constant-current control, thus increasing overall efficiency and operation flexibility of the light-emitting diode lamp under the alternating current or direct current power supply.

Abstract: An Anoectochilus spp. polysaccharide extract for stimulating the growth of advantageous bacteria, stimulating the release of granulocyte colony-stimulating factor (G-CSF), modulating T helper cell type I (Th1 cell), and/or modulating T helper cell type II (Th2 cell) is provided. The extract comprises an effective amount of a type II arabinogalactan of Anoectochilus spp. Also provided are a method for the preparation of the Anoectochilus spp. polysaccharide extract and the use of the extract.