The Exposure Lights Zenith 4 is built for riders who want a serious helmet-mounted MTB light without adding bulk or external battery packs. Exposure calls it its brightest helmet light, and the latest version pushes output to 2360 lumens while still weighing just 150g, which gives it a strong balance of power, low weight, and clean setup for technical night riding.
What makes the Zenith 4 especially strong on a product page is that it is clearly designed around real trail use, not just headline brightness. Exposure pairs the light with its long-established diffused 12° spot beam, adds USB-C charging with a recharge time of 2 hours 45 minutes, and includes Tap Technology so riders can change modes by tapping the body of the light or the helmet when that function is enabled.