Great grandfather Chan Kwong Kouk

My Great Grandfather co-founded Chan Kwong Kuok school which we revisited. He wrote couplets for the school and school name. When we went, the school board said it was ruined through all age. I am not sure if this was his writing, I am sure he wrote in calligraphy. This looks like it is a copy, done by marker pen. Still, the original was done by my Kung Tai. Very proud of him.

Missing first word is KWANG, meaning brightness. He had 2 names.