OK, so I'm new to this so I know this will be a wtf question for most. I have a couple of strands of chasing lights that my wife loves and I have kinda let them go over the years because I didnt know much about it all. Well, this year I am trying to figure it all out and get them back in shape (there were probably close to 50 bulbs out between the two strands). Well I started replacing bulbs and some of them when I replaced them were very dim so I used "different" bulbs but I dont know exactly what the difference was or how to tell the difference until I put them in and see it.
I assume its different voltage bulbs, but how do you know which is which by looking at the bulbs and also can you just tell by looking at a set or something?