Talk about carotenoid pigments in chloroplast.

Found in thylakoid membrane serve as secondary light collectors, terpenes, and absorb light in addition they absorb excess energy in order to prevent formation of O2 singlet that destroys biological molecules, all this diversity in light absorbers helps in effieciently have a better light absorbing spectrum. They are complexed with proteins named photosynthetic systems (PSI and PSII)