Method Seven Clip-On Aviator HPS Grow Room GlassesClip on and correct harsh HPS light with color balanced lenses that flip up, protect UV, and fit most prescription glasses. The same HPS filtering magic of our classic lens, but in a clip on that fits on most Rx glasses. Flips up when you walk out of the grow. Perfect color, complete protection under HPS lights. Lens Technology HPS Lens Technology Designed for the intense yellow spectrum of High Pressure Sodium lights we use unique notch filtering