I want to make an LED light to attatch to my paintball gun that i converted to an airsoft gun. Anyway, I have this LED headlight that is white light, and then I have this little blue keychain light. The keychain light is JUST AS BRIGHT as the headlight. I'm wondering what color would make things the most visible. My white light makes for terrible visibility. Also, with the viewing angle, i would imagine that 15 degrees is more concentrated than 30, right? How many mcd does 1 lumen equal? One last question, how many mcd is your regular keychain light?