A lighting device having: a light-emitting diode lamp having a light-emitting diode device sealed by a glass sealing part; and a fluorescent layer disposed on the side of an illuminated object of the light-emitting diode lamp. The fluorescent layer is operable to radiate a wavelength-converted light...http://www.google.co.uk/patents/US7534002?utm_source=gb-gplus-sharePatent US7534002 - Lighting device
