Other than simply giving my primary and secondary plastic buckets a sweet new look, I figured that the t-shirt would help filter out any UV light cast from the basement florescent lighting. I am guessing this is overkill, given the milky white color of the bucket plastic which probably filters most of it, and the short duration that those lights are ever on down there, when the wife is doing laundry or I'm staring at the beer buckets. Didn't know if it had any merrit though.