Rych, the Unidor is a Powerdoor version of Unistyle.....The brand name is McGraw-Edison because it LM was bought over McGraw I believe.....
I have one you can see my Unidor
here Also you can see my big and small version Unidors which are called Unidor 250 and Unidor 400 and it can be seen
here The Unidoor actually has a removable door (the ballast, the reflector is on the DOOR side you can see then example
here You simply replace the door but leave the upper part of the fixture on the pole.....so it is a powerdoor version of the older fixtures. One thing I don't really understand is McGraw stopped offering Unistyles when Unidors came out!