4WATT UV LAMP Uv curing nails pattern It is a clean, antiseptic effect, make them more healthy, more hard, more bright Rusy Using 1 pc 4watt bulbs; please replace the bulbs regularly for keeping the efficiency.Wavelength of highest peak=370.um(This wavelength is visible light, and harmless to eyes, but supposed not to stare at the bulb for a long time.)4WATT UV LAMPUv curing nails patternIt is a ...