Abstract:Light enables us to view, perceive and enjoy the various forms of visual communication. Inadequate light may lead to problems like lack of interest, failure to concentrate, sleepiness and apparent laziness. Further, eyestrain, headache, indigestion and irritability are the other problems due to inadequate light. In residential ho mes, the living roo m being used for different kinds of activities like, relaxat ion, family entertain ment, get together etc., which require variety of lighting techniques. Study room is also an important area where a lot of close visual tasks and skilled work are performed which require suitable type of lighting of adequate quantity. Hence measurement of light intensity is the important task to main required LUX levels for various workp laces. To accurately measure the light intensity in a given spot, it is best to use a light meter. In commercial light meters different signal conditioning circuits are used. Selecting a suitable signal conditioning circuit is an important task for instrumentation engineer. So, this paper tries to evaluate the performances of different signal conditioning circu its in terms of linearity, sensitivity and accuracy.
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