Every man has his price.
I personally would spend a few hours putting the lights on myself from parts locally purchased and save $100.
Hey, that's just me.
What is unclear is if there is anything in the "kit" besides the two lights. I'm betting there isn't. I figure the wiring harness is already in the cab. The reason I say that is with every other work light "kit" that JD sells that includes wiring harness, wire looms and wire ties, they are all broken down and have part numbers assigned. This is so you can order replacement parts in case you damage a harness or something.
If this "kit" is just two LED lights and a pair of nuts and bolts, you could get a pair of good quality LED lights for around $50 and save $180.
Some of the LED work light kits for the compact tractors cost almost $500 and you can go and buy similar lights yourself for around $60.