Only good to say about the 4' Costco fixtures and 4' bulbs installed years ago... not a single issue and ended up buying a lot for friends.
Moms garage/workshop was wired in 1959 with 4ea 3 bulb floresent metal fixtures... very heavy construction.
Dates back when they had starters and getting all 12 bulbs on the same page never happened... some would start, some flicker and some had to be replaced... bulb, starter or ballast... big heavy ones.
I took out all the bulbs and put 2 ea Costco 4' LED in each... so 12 40W bulbs removed and replaced with 8 LED.
I still like going into the garage and turning on the lights... instant on, silent, no flicker and the best light ever... just right illumination and color... this is what sold the neihborhood.
Not typically an early adopter as still have a rotary dail and rabbit ears and DSL... but the change has been great for the garage.
I left the ballasts in so it was as simple as R and R.
In Olympia the garage shop had 8 foot bulbs and always issues... just buying new and bringing home a problem and the cold weather meant poor light until everything warmed up.
Replaced the two each 2 bulb 8' fixtures with two 4' Costco fixtures... perfect for parking and storage and no more cold temp issues.