After buying the Amazon cheapo LED and it failing in two months I said what the hell. I went all out and purchased the newest JW Speaker adaptive LED headlight for my '19 Street Glide FLHXS. The new bulb did require the adapter from Harley but that is not all. Besides the harness coming off the bulb there was one additional red wire, about a 14 gauge or so. I had to hook it up to a power source on the bike. It is needed to provide power to the gyro in the new light bulb that reads lean angle and illuminates additional bulbs (LEDs) around the periphery of the headlamp while in turns. I didn't know what the red wire was for because the lamp came with no instructions. I went to the local HD dealer and got the instructions out of one of their adaptive bulbs while buying the pigtail adapter. As stated in the instructions for the install the it also instructed a BCM reflash was required. With that being the case, I said what the hell and had the dealer install the light, attach the red wire to power, and flash the BCM. It works great now. Looks bad ass with the black background going with the blacked out bike AND, I lightened a tremendous load of cash of my wallet. It is so easy to carry around now.