Apparatus for drying or hardening adhesive, namely, infrared radiation units for curing adhesives for use in the automated manufacturing process; adhesive drying apparatus for industrial purposes namely, namely, infrared radiation units for curing adhesives for use in the automated manufacturing process; LED light bulbs; air sterilizers; germicidal lamps for purifying air; electric water purifiers for household purposes; water treatment equipment, namely, ultraviolet sterilization units; apparatus for disinfecting cellular phones, namely, disinfecting ultraviolet lamps housed in a container or cover for disinfecting objects placed therein; light sources, namely, light bulbs for ultraviolet ray irradiation apparatus for ultraviolet ray hardening resin for use in the production and processing of semiconductors, liquid crystal displays, hard discs, optical devices and electronic parts; light emitting diode apparatus, namely, organic light emitting diodes lighting devices for drying nails; electric apparatus for drying nails, namely, nail drying machines for beauty salons; Apparatus for hardening nails, namely, ultraviolet gel manicure lights