I have a 2188 Case IH combine that I just did a HID conversion on the top of cab lights I did all 6 lights from Larson Lights. it was a straight forward install just hook up to existing wiring. I did put all new bezels or glass at the same time but let me tell you this, I don't usually write reviews on products but this impressed me to the point I have to share. Great price,fast service,and HOLY COW these things are like daylight, I mean BRIGHT!! and cheaper than LED I guess we will see how long they last. Thank you Kenny Larson for the great products