RE the red bulbs; we get regular bulbs & spray paint them ourselves, go to Walmart & get Rust-Oleum Engine Enamel red paint, good to 500 degrees heat -- works great! there's also a Bar-b-que paint if you can find it.
I still haven't figured out why anyone would want to spray paint their engine red, but -- whatever!
Of course now the problem is finding "regular bulbs"!
Harbour Freight has some nice cheap solid rubber tires that work good on tractors; that's what we used on ours, Jim made flip over axles out of wood, we flip them one way to move the tractor & when we get it centered in the new spot we flip them back to lower it into place.
The Rustoleum engine paint is good up to 500 degrees. Be sure & let it dry thoroughly before using it. We usually spray 2-3 bulbs at a time so we always have a spare.
I'll get out today & take some pics of the wheels on our tractor & get Jim to describe how he made them.
(lol, I told Jim I only wanted "three little hens" for fun & eggs. Now look where we are:
12 in the laying flock plus Eagle my wheaton Ameracauna roo, five Blue Orpington "teenagers", 3 Black Copper Marans, 1 Barred Rock & 1 Exchequer Leghorn 6 week old chicks, and 4 peacocks!)