Hi, Louis; welcome to the forum!
I'm not sure what you want. Are you looking for lights to illuminate the inside of your cab, or lights to mount on the cab to light up the area behind your tractor?
Interior lights I don't know about. Exterior lights, "everyone" is installing LED lights because they require very little amperage (amps) for a LOT of light (lumens). That lets us add some additional lights without having to worry if our alternators or dynamos will handle the load.
Most of the work lights that provide substantial nighttime illumination are 18 Watts or greater. Sadly, not all LED light measurements are the same; often one 18-Watt light is much brighter than another, and some 10-Watt (or even lower wattage) lights provide adequate illumination.
You will find some valuable information by searching some of the posts in the forum and reading about other folks' installations. On the other hand, if you just want to buy something and install it in hopes it will be adequate, then it seems that 18 Watts is a fairly "safe" threshold.
Please keep us informed of your progress!