Salaam, I don't have experience with LED's like shown on the link, but the coverage is 3x3 feet.
I think with your shelves being 4x1.5 ft you'd be better off with your original plan to use the T8 lamps. Of course they should have a kelvin of 5000k +/-.
The shop light reflector, or shade comes into play as well, but I see no reason why 4 lamps of the right lumens and spectrum wouldn't be perfect for your shelves.
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Tomatovillain
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