So, the 2018+ 1025R headlights are totally different than the older ones. They use conventional H4 headlight bulbs and reflector housings designed for them. I put in LED H4 bulbs in them, replacing the stock halogen bulbs (plug and play). Still not very impressive. Bright but the light is just kind splattered in front of the tractor and not very useful. I used the alignment screws to get them even and where they should be. Still sucked. So I switched the wire from the low beam slot to the high beam slot on the plug. Holy crap. Headlights no longer suck.
I wouldn't suggest doing this with the halogen bulbs due to heat and current. The LEDs use less current and dissipate heat out the back. Be sure to install the LED facing the correct direction, with the little shield facing down. I used these LED H4 bulbs, totally plug and play. https://www.amazon.com/dp/B074GZ3S4P
Pre 2018 were different. The headlights used the same bulb as the worklights, a #862 fog light bulb. Crappy light compared to these. My previous thread from my 1026r LED upgrade is here. That describes the older style headlights, as well the work lights and flashers. Short version, the fender work lights (all years) and the 2011-2017 headlights use these LED #862 bulbs.