The wire ground connecting of electrical appliance for LED utilizing

The wire ground connecting of electrical appliance for LED utilizing

On what condition will LED utilizing must be earthed? All appliances must be earthed. Be that the right . let’s analysis the question base on last standard of GB7000.1/IEC60598D.
Class I: The exterior leakage of lamp should be joined together and to the ground .
Class Ⅱ:without grounding
Class Ⅲ: not allowed direct ground connection