LED Garage / Shop Lights?

There are 2 kinds of "tombstones" , depending on if you have bulbs that only need power on one end or both. I prefer the non shunted ones which only need power to one end, wire all 4 bulbs from center of fixture to make it easy. Call the Pro guys, they were great and the first guys that actually knew what I was talking about. If you dont remove ballast then you use more power as they burn power even with no bulbs. LED are brighter on line voltage too. Sure beat buying new fixtures at $50 ea!!!