The grounded power cord should be a standard component of this lamp. Not on the principle that if someone asks, will get it. A great way out, advise the customer that should modify the home electrical system by adding RDC… Not every customer has to be an electrician and know how to do this. You pay great attention to the quality of the lamps (components used, modifications, cooling) and you neglect the basic safety rules 
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RDC it is the main component of any home electrical system. In USA it is 5mA. Ordinary it is 30mA. In Belarus or Russia or Ukraine they do not need ground wire, because they do not have ground contact (or just ground contact in socket without wire) in most situations.
So, stop your tantrum! 
OK, I see You know better and know everyones home electrical systems ingredients all over the world. For me EOT. 
I stay with Bocian here…I strongly appreciate your work but the enclosure should have a ground connection.
I love the Led lights and all the trend that is going around. However, I feel closer to the smart bulbs. For example, using a let all you get is different colors, but sometimes it might look unesthetic. However, when I bought my Vont bulbs, I could do much more.