This paper proposes the improved design of an ultraviolet (UV)- and-blue-light-inhibited white light-emitting diode for use as a safe and practical light source. Covered with a glass substrate coated with a photocatalyst resin on one side and a reflectance film on the other side. wavelengths below 400 nm are reflected back to re-excite the red-green-blue phosphors and. consequently. https://yeswellneses.shop/product-category/spirulina/