LED SPECTRA AND ITS PHOTOBIOLOGICAL EFFECTS

摘要

Future lighting will be cost efficient in terms of long life and low energy consumption but on the other hand photobiological aspects and human particular needs will be considered. To analyse this goals, general lighting will be carefully analyzed in terms of spectral power distribution and photobiological effects. Lighting systems that mimic daylight will most likely be LED based. However, observers' lenses change by ageing which majorly change light perception. Comparison of correlated colour temperature and colour rendering index as seen by observers of various age has been determined. Furthermore relative times needed for melatonin production suppression has been analysed and comparison to daylight illuminant D65 has been made.