"Brand new by popular demand. The Re-Designed Dimmer Switch. One of the biggest problems with the 20 volt plus belt lights on the market today is that sometimes they are just too bright. When your in that critical situation on that important cast and need that dim light so that the coon will look, we got you covered. The dimmer switch feature uses the 1st setting of the click switch to reduce the brightness of your light much like what an Amber Pop Cover will do. Available in the 21, 26, and 28 volt lights only."