Here is a simple one Shock...know how to wire ballasts...fluorescents and HIDs. And know how to wire them efficiently. It shouldn't take 4 hrs to wire 3 ballasts 8' off the ground.

We are also in NJ, and do a bunch of commercial/retail maintenance.

#1 attribute - know how to read and know how to think. Be able to figure out what's there, understand it, and then understand how it works. Be able to read schematics, you can fix anything, if you can understand the schematics.

I've been in this business going on 15 yrs now. We've done warehouses, factories, offices, retail stores, pharmacy's, etc...know how to read and how to think your way out of a paper bag, and you got it knocked.

PLC's - they almost all come with manuals. Might take a little longer, but the directions are there. And on the commercial side, you won't see to many of them.