 This paper discusses recent advances in algal bioreactors used for carbon dioxide removal, focusing on light intensity and photo periods. Light intensity and photo periods play a key role in efficient operation of algal photobioreactors, which can be improved by optimizing these parameters. Algal bioreactors have a wide range of applications beyond carbon dioxide removal, including biofuels, nutrition, and food production. This article was authored by Zerook Sharifkeen, Ali Elkamel, and Zim Bin Babar.