However, some people feel, to use and vehicle use in the lighting so widely used in white LED
, only the prices are not enough. For example, there must be inhibited to drive a white LED power supply circuit measures the power loss. Backlight for cell phones and other low-power white LED power supply circuit in the power conversion efficiency of 90%, while for the intended use of the high-power white light LED current can only reach 80%. In fluorescent lamps, the power supply circuit in the power conversion efficiency of more than 90%. That is, the loss of power supply circuits are still 2-fold difference. Using high-power white LED, need to invest a large current, also need a high heat printed circuit boards. Install the device easy to operate when the white LED is also critical.