Safe wavelength (385–410 nm) that does not harm skin or eyesight. Health benefits:
- Vitamin D production (important for calcium absorption, immunity, heart health, and blood pressure regulation).
- Skin treatments: Effective for eczema, psoriasis, vitiligo, jaundice, and dermatitis.
- Mood enhancement: UV exposure stimulates serotonin, linked to well-being and happiness.
- Melanin production: Protects skin by absorbing UV radiation.
- Air purification: UV-C light (240-280 nm) eliminates microbes and contaminants.