I attached a pair of lights to my ROPS just like several other folks have done, and they work great, except for one thing. As long as I'm facing frontwards and plowing ahead, they really help, but whenever I need to look over my shoulder to back up or to plow with my rear grader blade, I'm partially blinded by them. Fortunately, I don't need to plow in the dark very often, so it isn't a big enough problem for me to go thru the bother of relocating them. A suggestion for you would be to mount them below your head if possible with an 'eyebrow' on them to keep from being blinded. This assumes you mount them to your ROPS. If you can find a place to mount them ahead of your body somewhere on your tractor, that would be best. Some folks have mounted aux lights on their loader arms with good success.
Corm