Graphic design is never apart from photography. Talking about photography, lighting is one of the important factors in taking photographs. If you are a beginner photographer, try not to buy expensive equipment. With simple equipment and even handmade equipment like reflector that you can create by yourself can produce a great result.
It is good to have equipment and good studio lighting. With proper usage it will produce a good result, but don’t forget about natural light. Believe or not, in my web design and blog template projects, I often use natural light for my photography.