I just finished putting a canopy and lights onto my
L4200. I got 55W 4x6 white halogen fog lights at Autozone for $25 a pair. A friend gave me a canopy off of his Massey, which was cracked due to a tree falling on it. I re-set and welded the support bar to be at the right angle for my tractor, fixed the cracks in the canopy with zip-ties and epoxy, then spray painted the canopy orange.
I put a pair of lights facing forward and a pair facing backwards. I mounted the lights to the top of the canopy, using the canopy mounting bolts. That way, if I ever take the canopy off, I can leave the metal structure to use as a light bar, and nothing will change with the lighting setup.
110W lights pull about 8-9A, so even if I turn on both front and back, loading is less than 20A - I'd assume any tractor can handle 20A of lighting. Normal operation would only require running one set of lights, however, so normal nighttime draw is <10A, which is nothing for the alternator.
I did all of the wiring using 12ga outdoor lighting wire, which is perfect for this application for obvious reasons, and run all 4 lights on a common 30A fused circuit. I don't have pics handy, but will try to remember to post them later. Cost for the whole canopy/lighting project was about $60 for the lights and spray paint. It looks great.
JayC