Yes you can get the bubble for your Impacr Archery.I seen the set of sight, bubble and blue light on e-bay a week ago .I don't know why anyone would need the blue light for their Impact sight, because it's plenty bright as Gruhotbigracks said ,I can see my pin as well well after shooting light has passed .I don't know much about the Cobra but I do own the Cosmic from Impact and it's the best hunting sight I've used .