I’ve replaced a couple Stern fluorescent bulbs with LED tubes. I’ve done Metallica and AC/DC. There are two types of LED tubes... single end and dual end power. I used single end for my retrofits. I used a Maximus T8 LED tube (M-9FL-T8-840-2) that can be bought from HD or Amazon for about $10. This tube can be rotated to diffuse the light at the angle of your preference and you can get it in a few different color temps. I used 4000k as I believe this is what newer Sterns use.

You can use the existing tombstones and simply rewire the circuit... Cut the ballast wires, next cut the red and black/wht wire off the right side tombstone and then cut the thicker black wire off the starter. You’re now left with a single white wire and single black wire on the left side and a single black wire remaining that was connected to the ballast. Pull the black wire that was connected to the ballast down along the left side that was connected and connect it to the black wire that was connected to the starter and you’re done. The Maximus bulb is labeled with “L N” on one side so that’s the side I connected to the left tombstone. There’s a push button on the other side of the bulb... push it in and you can rotate the bulb to your desired position.

Hope this is helpful!

The route I went is definitely not for the purist however it’s quick and cheap and produces no flicker. Start to finish, I was done in 10 minutes. I tried a few different bulbs that were marketed as PNP however they were made for electronic ballasts and didn’t work (GE, Philips and Feit). The current Marco bulbs are $50 and I’d much rather spend that on a mod than retrofitting a light bulb. The Marco bulb has the same specs as the $10 bulb I installed and still requires cutting/splicing. To each their own.