A dental operatory lamp (100) used to illuminate an operating area comprising a plurality of color LEDs (118), an optical light guide (136) for combining light (154) from said LEDs (118) and at least two user selectable light spectra, one of said spectra providing white light with color temperature in the range 4000° K-6000° K and one spectra having reduced output in the wavelength range 400-500 nm.
