With Blue LED light uses short wavelength, that easily shows of scratches, dust, and moulds in camera lenses and cameras! It is possible to adjust (zoom) the luminous flux further depending on your need for power. From large aperture lenses to the small windowpane of a viewfinder, the Blue LED light offers optimum light distribution for your needs. The colour of the powerful 3 watt LED can be changed from blue to white, depending on your need making the light a handy tool.