Explore the world of ultraviolet light and construct an Arduino-based UV Index Meter in this comprehensive 47-minute video tutorial. Learn about the properties and applications of UV light, including its effects on human health. Discover how to safely work with UV LEDs and observe common household objects fluorescing under ultraviolet light. Gain hands-on experience with UV sensors like the SENS-43UV Analog and SI1145 UV IR Visible Sensor. Follow step-by-step instructions to build two versions of a UV Index Meter: a basic model and an advanced design that includes temperature and humidity measurements. Perfect for Arduino enthusiasts looking to create a practical project for outdoor use and sun safety.