generic value products conditioning shampoo compare to shimmer lights, 33.8oz generic value products generic value products (gvp) conditioning shampoo - compare to clairol shimmer lights (33.8oz) is a protein-enriched conditioning formula that tones down the brassiness on blonde and gray hair while refreshing faded highlights and adding vibrancy to dulling hair. hair is left vibrant and shiny without the heavy residue or oily feel. compare to clairol shimmer lights original conditioning shampoo and save! the gvp brand was formed because a group of experienced beauty professionals knew they could produce at "popular prices" a product as good as the higher priced, quality name brands.