Blue Light Elf Spray is a product that claims to protect your skin from the potentially harmful effects of blue light exposure, which is emitted from screens like computers, smartphones, and televisions.

The effectiveness of such products largely depends on their ingredients and formulation. Blue light protection in skincare often involves antioxidants, which help to neutralize free radicals generated by blue light exposure. These free radicals can cause oxidative stress, leading to premature skin aging and other skin issues.

However, it's important to note that while blue light can potentially cause harm, the extent of this harm is still a topic of ongoing research. Most studies on blue light's effects on the skin have been conducted in vitro (outside a living organism), and it's unclear how these findings translate to real-world, human skin exposure.

Moreover, the amount of blue light emitted by screens is significantly less than that from the sun. Therefore, while blue light protection might be a beneficial addition to your skincare routine, it should not replace other important steps like using a broad-spectrum sunscreen to protect against UVA and UVB rays, which are known to cause more significant skin damage.

In conclusion, while Blue Light Elf Spray might provide some level of protection against blue light, it's crucial to keep in mind that the most effective skincare routines are comprehensive and address a variety of factors, including hydration, nutrition, and protection against all forms of harmful radiation, not just blue light.