We are in the process of helping our youngest son with fixing up a house for him to move into. In the process of many things being done, we are looking at replacing fluorescent light bulbs with LED ones. (That is going on with all the electrical lights.) Not being an electrician but having some experience with wiring and such, I've been studying articles and YouTube videos for guidance. In the videos, I've seen wiring done in two different ways. One way, the guy cuts all the wires at one end of the light fixture and wires in a particular way at the other end after removing the ballast. In the other video, the guy wires one set of wires at one end and the other set of wires at the other end after removing the ballast. Question: Would I be right in presuming that the guy that is wiring both ends is working with double ended bulbs and the other guy is working with single ended bulbs? In looking at our fixture(s), we have found that our fixture evidently has non-shunted tombstones (funny reference when working with electricity). Beyond the one question above, is there any other advice that we could get from someone that knows this stuff? Thanks in advance for any help given.