Would fabric color be treated as with painting using 5000K, or 6500K?

Looking at Northlux 95 CRI T5 4 ft. fixtures for my wife's quilting studio. Would fabric color be treated as with painting using 5000K, or 6500K?

I read in the reviews the power cord is short and needs to be plugged directly into a power outlet. No extension cord. Is this true? I would need some sort of extension cord arrangement unless you can give advice on other options that would work.

Also what are the physical dimensions of the Northlux 95 CRI T5 4 ft. fixture? Width, Height, and Length.

Though we do not have any direct experience in colored fabrics, we have shared an article below that compares the benefits of the 5000K and 6500K color temperatures for artwork creation and color-critical work. 

Difference Between 5000K and 6500K Bulbs

In summary, the difference comes down to personal preference for creating under a neutral color point or a cooler daylight color. As the 5000K and 6500K options will offer a high CRI of 95+, both will be able to provide accurate color representation. 

As a further note, we can confirm that the T5 Linear Light Fixtures ship with a power cord that is 12" in length. Though we do not carry longer power cords, they are available from third-party storefronts by searching for the term ‘c8 plug to c7 receptacle cable’. In our own search of Amazon, there appear to be several options available. 

As the T5 Linear Light Fixtures have recently undergone a hardware update, we, unfortunately, do not yet have the dimensions available. We would like to sincerely apologize for any impact this may have on your installation planning.