Method Seven "Aviator HPS Clip-Ons" change the way you see your plants and grow room using your own prescription glasses! Our Aviator style clip-ons have high quality lenses with spring-loaded rubber coated metal clips that gently hold to your eyewear. This Aviator style fits over a wide variety of larger lenses. For smaller or less shaped lenses look at "The Classic" Clip-on. Manufactured in Italy to our exacting standards by Carl Zeiss Vision. For use under HPS lighting. (See LED Clip-on models for LED lighting).