Share 'Astro bulb problem'

Hello fellow goo heads! I know this question has been asked a million times but all the links I found on previous discussions no longer exist. I purchased an Astro a few days ago and it's finally on it's way. This Astro takes a screw bulb. I want to be sure I'm buying the right bulb because they all look larger than the ones that came with my other Astros in my current collection.  Plus they are…