Ocean Reef Vesper HeadlightVesper Headlight The all new Vesper is a lightweight, powerful, easy to use, fully integrated secondary diving light. Its reduced size and patent pending placement inside the mask results in a unit that increases the negative buoyancy of the system while being incredibly comfortable. The Vesper is: smaller, lighter than the VL, doesnt require adhesive or screws, can be installed by end user with no training, charging via USB, features an infrared