Lighting plays a crucial role in setting the mood and enhancing the retro theme in your kitchen. Consider installing retro-style pendant lights or chandeliers with vintage-inspired designs. Look for fixtures with chrome or brushed nickel finishes and glass shades in retro shapes like globes or cones. These lighting fixtures will not only provide ample illumination but also serve as eye-catching focal points in your kitchen. Additionally, consider adding under-cabinet lighting to highlight your retro countertops and create a warm and inviting ambiance. With the right lighting, you can create a cozy and nostalgic atmosphere that complements your retro diner booths.