The amazing new Transition peep sight uses photochromic technology to create a peep that self adjusts its tint level according to available UV light. The peep will be dark during daylight hours, but will fade to almost clear when hunting in low light conditions at dawn or dusk. You no longer have to worry about your peep being too dark in low light conditions! Ultra-light 6 grain weight -- gain up to 5 feet per second arrow speed.