A fresh lamp, which includes: an LED module, and a driving power supply connected to the LED module which includes a bright-dark control circuit; wherein the bright-dark control circuit includes a programmable circuit, the programmable circuit being configured to program product information into binary codes; wherein the bright-dark control circuit is configured to switch on the driving power supply according to one of the numbers “1” and “0” in the binary codes and switch off the driving power supply according to the other one of the numbers “1” and “0” in the binary codes so that the LED module emits light signals alternating with brightness and darkness to form light emission information corresponding to the product information.