Been trying different lighting on tractors since around 1992. Those kits look interesting. I think the Maxxima MWL42's ran me around $45 each without wiring and switches. A half dozen MWL42's plus a couple cubes wasn't cheap - but it is effective. ROPS or Roof mounted lighting alone doesn't work well for me when mowing. This year mowing in the daylight has been easy with the CV19 Vacation. There have been some years when it was frequently dark before I could fire up the tractor and start mowing.
The link below shows what has been the best for me. I do like the LED's. There seems to be at least a little uncertainty in some circles concerning how the sellers rate their lumens and watts when trying to sell you on their wares. I'd only consider a flood pattern. Work lights are for getting lots of light in the nearby area. I think my
L4240 hit 19 MPH on the way to town, so (A) I don't need to light the road 1,200 feet ahead, and (B) No point blinding an oncoming motorist. Plenty of idiots with aftermarket lighting on regular vehicles doing that. (Note: I really don't use aux. lighting on the road anyway).
Lighting Revisited - OrangeTractorTalks - Everything Kubota