light, radiation, rays, irradiation, spectra, absorption, spectroscopy, exposure, wavelengths, spectrum, illumination, spectrophotometry, lamps, therapy, damage, microscopy, region, energy, detection, photography, treatment, observations, lights, sunlight, absorbance, disinfection, divergences, fluorescence, excitation, erythema, lamp, catastrophe, phototherapy, injury, degradation, measurements, astronomy, filters, vision, sensitivity, protection, absorbers, emission, waves, radiations, lighting, photons, spectrometry, photolysis, inactivation, photographs, treatments, sterilization, curves, mutagenesis, inhibitors, carcinogenesis, transmission, microscope, visible, keratitis, dimers, bands, mutations, receptors, burns, reflection, detectors, optics, lasers, photometry, irradiance, induced, induction, lithography, microspectrophotometry

near, far, extreme, solar, wave, short, deep, invisible, long, middle, harmful, intense, wavelength, optical, shorter, blue, strong, shortwave, longer, lethal, excessive, damaging, yellow, germicidal, monochromatic, green, artificial, energetic, enough, dangerous, characteristic, pulsed, infrared, inaccessible, shortest, coherent, conventional, enhanced, filtered, vacuum, accessible, tunable, excess, absorbed, line, suberythemogenic, backscattered, length, producing, exciting, concentrated