Fluorescent lamp fixture
 

I have an 8 foot fixture with High Output lamps. One comes on with the others but after a few mins, maybe half hour it goes out. Does not seem to be a short and bulbs ends don’t look discolored.

Is this a transformer problem. Fixtures are probably 15+ years old

Thanks in advance

Ballast is shot. Convert to 8 ft LED.

That’s what I figgered. I’ll pick up new LED bulbs and make the swap.
Thks much, Jerry