I'm studting light properties............
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Photometry is the science of measurement of light, in terms of its perceived brightness to the human eye. It is distinct from radiometry, which is the science of measurement of light in terms of absolute power.\n\nPhotometric measurement is based on photodetectors, devices (of several types) that produce an electric signal when exposed to light. Simple applications of this technology include switching luminaires on and off based on ambient light conditions, and light meters, used to measure the total amount of light incident on a point.\n\nFor complete details refer\nhttp://en.wikipedia.org/wiki/Photometry_%28optics%29
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You must to review the diagram... note that the light escape in a second reflection, no in the first reflection.
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My outlook is glowing!
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oh oh I'm LIGHTING HAD LITE OUTSIDE VERY BRIGHTLY
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I use a halogen desk lamp. I use sun glasses, they are not dark glasses though, they are almost rose colored glasses. I feel a good difference. I have never tried the real light therapy. I hope this works for you.
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I know EM can go up to 100,000x (maybe beyond?), and light can go up to 1000x.  I'm not sure what the limit on EM is, but i think it's less than 800,000x.  So #4 looks right.
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Try this: http://www.rp-photonics.com/pockels_cells.html
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colors become more vibrant
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I think you have seen the light. Congratulations!
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It will be used in reference to a prism.\n\norange light has more wavelength thanx yellow.
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Did you measure the absorbance of a standard in addition to the unknown sample?\n\nIf so, you could plug the values into (As / Au) = (Cs / Cu)\nWhere\nAs = Absorbance of the Standard\nAu = Absorbance of the Unknown\nCs = Concentration of the Standard\nCu = Concentration of the Unknown?\n\nAlternatively, did you get a value for the molar absorptivity of PNP at the wavelength you used? \nIf so, you could plug it into\n\nA = (epsilon)(b)(c)\n\nWhere\nepsilon is the molar absorptivity,\nb is the length of the path through which the light passed,\nc is the concentration of the chromogenic substance.\n\nAnd you could rearrange that to solve for c.\n\nHope it helps
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Look for water mark images by holding up to the light.  Look for plastic strip. Look for color changing ink,etc.
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Compact Fluorescent Lamps\n\n  ************************************************************************\n  *                  COMPACT FLUORESCENT LIGHT BULBS                     *\n  *                                                                      *\n  *                       **** Version 1.10 ****                         *\n  *                                                                      *\n  *                      Copyright (C) 1996, 1999                        *\n  *                        Samuel M. Goldwasser                          *\n  *                        Donald L. Klipstein                           *\n  *                                                                      *\n  *        Corrections or suggestions to: sam@stdavids.marconimed.com    *\n  *                                       don@misty.com                  *\n  *                                                                      *\n  *                     --- All Rights Reserved ---                      *\n  *                                                                      *\n  *    Reproduction of this document in whole or in part is permitted    *\n  *    if both of the following conditions are satisfied:                *\n  *                                                                      *\n  *     1. This notice is included in its entirety at the beginning.     *\n  *     2. There is no charge except to cover the costs of copying.      *\n  *                                                                      *\n  ************************************************************************\n\n...\n\n8.  Like other fluorescents, operation at cold temperatures (under around\n    50 degrees F) may cause reduced light output or erratic operation.\n    Some models work fairly well down to about 35 degrees F, others may\n    get noticeably dim below 60 degrees F.  The optimum temperature range\n    of a particular lamp may vary with burning position, generally\n    preferring cooler temperatures if operated base-down.\n    Compact fluorescents may also not like excessive heat.  Some ballasts\n    are unreliable in ambient temperatures much over 120 degrees F.  This\n    is sometimes a problem in enclosed or recessed ceiling fixtures if\n    heat in the fixture builds up.
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I'd probably choose luminescent due to the cheapness and effectivity of the lightbulb; I personally don't like the light a incandescent light bulb gives off.
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I know that different colors are "visible" at different wavelengths.  So, depending on an increase/decrease in energy, you would be at varying wavelengths?
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turn off lights... use a flashlight for sun. see how the opposite side is dark but the front is light.
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You have to remember these are descriptions based on experiments. Light can act as both- as do other particles. Keep in mind that the map is not the territory.....