<prompt> Patients with porphyria are highly sensitive to which wavelength :290-320 nm400-420 nm320-400 nm250-290 nm  <response>: Porphyrin are excited by visible light with a wavelength between 400 and 410 nm and emit an intense red fluorescence. The released energy reacts with oxygen to produce free radicals and singlet oxygen that damages tissues Mc porphyria - porphyria cutaneatarda if- Red urine - DD - myoglobinuria 