UVB lights, a type of grow light that delivers ultraviolet B rays, can improve terpene development and harvest quality in indoor cultivation. Using UVB lights can increase terpenes by up to 20-50%, resulting in buds with more distinct flavors and aromas. Additionally, UVB lights can improve root development, vegetation, oil and resin production, and even plant defense mechanisms. Other factors that can enhance terpene content include high-quality grow lights, balanced organic nutrients, proper harvesting, and curing techniques. Adding UVB lights to your setup can be a critical factor in improving your harvest quality.