Abstract
The main purpose of lighting is to make the viewers seeing clearly and comfortably. Desk lamp is one of the common lighting we use in life .In addition, LED is becoming more popular and will be the main stream of lighting in the near future. This study is to find out the best lighting conditions using LED desk lamp to reduce the reader's visual fatigue and provide a more comfortable reading light source.Two stages of experiment are conducted in this research .In the first stage, subject evaluated six different lighting environment 3 illuminance levels (500 lux / 750 lux / 1000 lux) and 2 color temperature levels(3300k / 6000k) to find out the most comfortable combination.The second stage will choose the top 2 comfortable environments from stage 1 to process the CFF experiments to investigate and verify the viewers/testers visual tiredness to make sure the preciseness of this study result of stage 1.The study result shows the light 3 condition (1000 lux/3300k) in experiments is the best lighting condition in reading. This condition can clearly identify the patterns and words without any eye harsh, headache and tiredness in reading. The second best lighting condition is in light 5 condition (750 lux/6000 k). Both conditions have no significant effect in CFF test. In other words, there will have no visual fatigue in these light environments .This study result can be the reference of customers in LED lamp purchasing, and the manufacturers in future LED lamp design.Keywords: Visual comfort Illuminance Color temperature Visual fatigue