They are sedici brand sold by cycle gear. I have used them with the tw but have only had them maxxed out to let them heat up. Didn't notice any dimming or anything that led me to believe they were putting a strain on my 2010's system. I also was charging my phone at the same time. They are very comfortable and I kept turning them from the lowest setting to off because they would get too warm! That was riding in 38° weather. I'll ship them to you for $110.