We recently changed out about 25 fixtures in our office to LED panels. Work and look great, but in one of our larger rooms they would like for us to simply go with LED bulbs. I'm aware of the pros/cons with the Plug and Play LED Bulbs and plan to by-pass the ballasts. What I'm confused about is why the by-pass bulbs are more expensive than the plug and play? And could the plug and play not be hard wired as well or am I missing something?