RHP Sizing for T8

[fadingdaylight]

I am going to try a Pro Products heat panel next to see which I like better. I hear great things about their reliability and safety. And I want to see what the plugs look like, lol.

This is important, I'm running a Herpstat 2, so I don't want to lose an outlet. Can anyone fill us in on the plug style that Pro Products uses?