16 Human Vision and white LEDs.partI

16 Human Vision and white LEDs.partI - Primary Energy...

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Primary Energy Consumption in Buildings by End Use (1998) Source: BTS Core Databook, August 2000, Table 1.1.7 and Industrial Building Estimate from Table 1.3.11 Space Heating 9.4 Quads (25%) Refrigeration 2.4 Quads (7%) Appliances 5.0 Quads (14%) Water Heating 4.1 Quads (11%) Lighting 6.0 Quads (17%) Space Cooling 4.3 Quads (12%) Ventilation 1.2 Quads (3%) Other 1.3 Quads (4%) Unallocated 2.6 Quads (7%) 36.3 Quads 1 QUAD~10 15 BTU (a LOT of energy!)
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Lighting Energy Use for All Building Sectors by Technology Incandescent Fluorescent 0.0 1.0 2.0 3.0 4.0 Residential Commercial Industrial Other High Intensity Discharge quads Total: 6.3 quads 10-20 lm/W 30-90 lm/W 40-70 lm/W LEDs 100 – 200? lm/W
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The Human Eye http://home.wanadoo.nl/paulschils/05.00.html The Human Eye is constructed with The following elements: 1.Iris – Colored part of the eye 2.Cornea – protective layer 3.Retina – light sensitive imager 4.Rods – low light sensitivity sensors 5.Cones – Color sensitive sensors (3) 6.Lens – images scenes on retina 7.Pupil – adjusts light level
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Eye Sensitivity
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16 Human Vision and white LEDs.partI - Primary Energy...

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