Built our 9 x 8m shed about 12 years ago.
Just put 6 x double fluros in at the time as I had them and they seemed to do the job.
As they yellow off fail, I have just been replacing them with UFO style LED high bay circular style
Unreal lighting output...but as noted the wall switches do get a bit noisey.
Maybe time for a mech changeout day.
I ended up using impulse relays and using push button light switches. I got sick of the lightning every time I switched on.
