That seems almost pointless today, kind of like converting a 57 chevy to EV power.
I fail to see how. The new LED fixtures I've seen have integral LED's. When they fail you replace the entire fixture. By modifying a fluorescent fixture for LED's, you just replace the bulb when it fails. If someone has a burning desire to retain the ballasts with an LED, those versions are available....but why?
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".