Ecclesiastes 1:9
What has been will be again,
what has been done will be done again;
there is nothing new under the sun.
@SnowBlazer I concur with
@stickypoop ...^... If I may suggest.... Have a look at these brackets... assuming you already have an idea of what you want in the manner of Ditch Lights and the Weather-Proof wiring set up they will of need require, then perhaps these will be adjustable enough in design to warrant a look-see... and besides... at under $30.00... the practical necessity of having what you want done in your Mind's Eye should not be inhibited because such a device needs some minor support mechanism re-invention to get the job done.
You won't need a two car garage and a triple decker tool chest chock full of everything in the way of tools ... just a nice, wide double layer of Cardboard and your Dining Room Table as a work space to do any Modding adjustments. When they are done, you can take them outside in the yard and grab a can of your "nearest match" Rustoleum paint and dress up the brackets in color, quality and appearance to look like they were custom made for your vehicle.
That said... As for your
original idea and your motivation to pursue solving the problem with a new design, I salute you! As a successful inventor who has been laughed at for my efforts more often than most, I appreciate and know what it feels like for others not to understand that in matters of invention, if one focuses on the costs, the difficulties and even the impracticalities of what is possible to create from your own ideas... nothing would ever be invented...or ...RE-Invented... for that matter. I admire you, Sir.
I hope this link is helpful:
http://www.realtruck.com/hella-lighting-mounting-brackets/