The אור גנוז, the hidden light, is the ancient and primordial light that illuminated the world for the first 36 hours of creation. Then God concealed the light.
Some of this light is for the righteous in the world to come. Some of it is hidden in the secrets of the Torah. Many of the secrets of the Torah are in the Zohar. And some of the secrets are in the Torah Codes.
So it is natural to look for key words Zohar, The Ari and The Torah Code against the anchor Hidden Light and The Secret.