skinLogix is a Richfeel company. As you may know, Richfeel are famous trichologists, with a history of successfully treating hair related issues in India.
There are 2 ingredients these products use that I suspect are skin lighteners: Berberis Aquifolium and Hydrolyzed Rice Protein.
Berberis Aquifolium is used in homeopathic medicine to reduce acne, dark circles and smoothen skin out. Hydrolyzed Rice Protein has a bunch of amino acids and as an addition to skincare products, I believe it helps the skin to hold moisture (its a humectant).
I am not at all confident that either of these products promotes skin lightening, simply because I cannot find enough information verifying this.
When I do, I will update this page.
P.S. In any event, I am not rushing out to buy either product, as they both contain parabens. The day product also has benzophenone-3 which I also avoid.