KT Full LED Headlight Assembly for Kawasaki NINJA 400 2018+ Green Demon Eye

First thing I'll say, these are only plug and play based on your idea of what plug and play means. I took plug and play to mean that with no knowledge base of how to install headlights on a motorcycle, I could do this by unscrewing some screws, unplugging OEM headlights, plugging in these headlights, re-inserting the screws and presto! Done. That is not the case. Less than 5% of the entire install process is plug and play. My install process required the removal of a majority of the front end parts of my bike, including fairings. As it turned out, one of the wires was too short to reach it's connection point. This meant lengthening the wire. So that entailed stripping and soldering the wire to make it longer. Then of course you have to seal and then heat proof it. Not that big of a deal, unless you were expecting plug and play. I was expecting the process to take less than an hour. Instead, it took about 3hrs. Now, full disclosure, mine was done by professionals with over 20yrs experience (even they say this isn't plug and play and this is what they do for a living). I watched the entire process. I am still amazed that this is considered plug and play. I never would've been able to do this on my own. Perhaps it's possible that the wire that required lengthening was an anomaly specific to my kit. Once you get past the disassembling, soldering, sealing and heat proofing, then the next few steps are plug and play. Then you have to tap into the turn signal circuitry to get them to work properly (not plug and play). Fitment is excellent though. Except that 1 wire, all other points fit and align perfectly. Once these are installed, they look GREAT! They are bright, clean and definitely give your bike a different look from stock. I find the low beams to plenty bright. I find the high beams to be extremely bright. Even the running lights are plenty bright. I will say that one persons idea of bright may not be the same as someone else's idea of bright. No matter what your idea of bright is, these are most certainly brighter than OEM.Finally, if you are comfortable tinkering, disassembling, wiring, soldering, then this may be a good little project for you. None of it is necessarily hard, just outside of my wheelhouse and exceeds my idea of plug and play. I would suggest a professional installation unless tinkering with motorcycles is your jam. I still give it 5 stars cuz they look and operate sensationally. They arrived on time and had all the parts it said it would have. Get the relay (sold separately) and install it. The relay was plug and play. It took less than a minute.