I just installed and hug a 7 foot diamond light above my table. Instructions are horrible and very outdated. You have to mount the light assembly and ballast in the wooden light fixture first and then wire it all together and then wire it to your power source. Luckily I had a power source right above where my table was located. I installed LED bulbs directly to the fixture. You do not need to change the ballast. There are a variety of LED bulbs that work with the fluorescent ballast. You just have to buy the correct ones. These are the ones i used. They are great