I was kind of responding to Traci's questions.

You can use the reflectors but the tombstones that the lights hook into have to be the right kind. Some companies supply the right kind and all you have to do is replace them. There are some LED bulbs that have ends that are supposed to work with either kind but I saw lots of negative reviews for them. You do just remove the ballast and wiring to the ballast. I looked at a lot of information on it when trying to figure out out to do with 3 T8 reflectors that hold two bulbs and the ballasts and tombstones cannot be replaced and two T5 reflectors that hold 4 bulbs with defective tombstones. I found it all to be very confusing. But, there is one kind of fixture that says that it can easily be converted to LED. If I invest in any more reflectors I will get those.