How Does Lunula Laser® Work? The Lunula Laser® is a cold (low-level) laser that uses two types of light – one violet and one red – to treat fungal nail infections safely and painlessly. The violet light targets the infection directly, while the red light helps improve blood flow and stimulates the body’s natural healing response. Unlike hot lasers, Lunula Laser® works without generating heat, so there’s no discomfort or risk of burning. How Does It Kill Fungus? The Lunula Laser® weakens and destroys fungus by using light energy to disrupt the fungus at a cellular level. The violet light damages the fungal cells, stopping them from growing and spreading, while the red light boosts your immune system and helps the nail heal from the inside. Over time, this dual action clears the infection and allows new, healthy nail to grow back.