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Another vote for too bright. And for nef's the colour/temperature point.
This is not a space you'll spend 8hrs a day in, nor want to chill in for leasure. But dropping something and not being able to properly see it will be infuriating. Also adding storage and stuff over time will suck up the light. If it is too much you can always take one strip blub out, and it's just the waste of the cost of the fitting.
My outhouse is white inside with a bright AF strip light, the garden shed is red cedar with a dim outdoor light inside. It's so much better doing jobs in the outhouse when it's dark.
How blind are you? I'm fucking blind in low light, so I never regret good illumination. I'd also make sure the colour temp is right. 4000k is a lot nicer to look at than 1000k. Painting the walls white will deffo help illumination.
If you're working on bikes down there, I'd deffo want to err on the side of more light. Doing fiddly things in poor light makes them a lot harder in my experience. I'd also opt for having longer batons so the light is more even.