Fighting Fading
When it comes to fading, the simple truth is that you need to protect your products from UV rays. Not only does the sun cause fading, but florescent lights also give off UV rays. However, florescent lights are much slower acting than the sun.
The sun is particularly cruel to both natural color additives and dyes. So whether you are outside or inside, it’s possible that some fading may happen. Your best bet is to protect your products with packaging.
There are bottles and jars that are treated to resist UV rays, and then you have the good old brown paper bag approach to things. Sometimes a decorative opaque container can be just as or even more attractive than a clear container. It just depends on your marketing niche and how you want to present your products.