This article introduces different structures that bacteria use to capture light for photosynthesis. Bacteria have adapted their light-harvesting systems to work efficiently in various environments and light conditions. The review discusses the pigment-protein complexes in purple bacteria, green sulfur bacteria, acidobacteria, filamentous anoxygenic phototrophs, and cyanobacteria. It also highlights recent discoveries like the structure of the CsmA chlorosome baseplate and energy transfer kinetics in green sulfur bacteria. The article points out areas that need more research to better understand how bacteria use light for energy.