Replace your standard 1156 bulbs with a nice Halogen upgrade.  These Philips 795 lamps are a perfect fit and will increase your vision if you are running late on a lawn mow/yard job.  I have these in my X330 for the past 2 yrs and so do all my neighbors!   Great simple upgrade.  Filament is in the correct position and is great for the optics.  LED's are nice but the beam is scattered about because the reflector optics are not designed for a LED chip.... 

This will replace the standard 1156 bulbs in your tractor.  Deere part numbers AD2062R, A-1156, A-1156L24 

Thanks for looking!