I can only assume it has heat resistant pigtails. I don't want to drive over to my local electrical supply store to check it out. But I do remember what I've seen many times in the past. With a fixture rating of 600 watts at 250 volts, the pigtails have to be heat resistant.
When you find a place on the Internet that sells the Leviton 8101 one at a time, go ahead and order it. If the socket's pigtails are not right, I'll buy it from you.