Illumination.php

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<?php
#require_once 'Zend/Measure/Abstract.php';
#require_once 'Zend/Locale.php';

class Zend_Measure_Illumination extends Zend_Measure_Abstract
{
    const STANDARD = 'LUX';

    const FOOTCANDLE                  = 'FOOTCANDLE';
    const KILOLUX                     = 'KILOLUX';
    const LUMEN_PER_SQUARE_CENTIMETER = 'LUMEN_PER_SQUARE_CENTIMETER';
    const LUMEN_PER_SQUARE_FOOT       = 'LUMEN_PER_SQUARE_FOOT';
    const LUMEN_PER_SQUARE_INCH       = 'LUMEN_PER_SQUARE_INCH';
    const LUMEN_PER_SQUARE_METER      = 'LUMEN_PER_SQUARE_METER';
    const LUX                         = 'LUX';
    const METERCANDLE                 = 'METERCANDLE';
    const MILLIPHOT                   = 'MILLIPHOT';
    const NOX                         = 'NOX';
    const PHOT                        = 'PHOT';

    protected $_units = array(
        'FOOTCANDLE'              => array('10.7639104',   'fc'),
        'KILOLUX'                 => array('1000',         'klx'),
        'LUMEN_PER_SQUARE_CENTIMETER' => array('10000',    'lm/cm²'),
        'LUMEN_PER_SQUARE_FOOT'   => array('10.7639104',   'lm/ft²'),
        'LUMEN_PER_SQUARE_INCH'   => array('1550.0030976', 'lm/in²'),
        'LUMEN_PER_SQUARE_METER'  => array('1',            'lm/m²'),
        'LUX'                     => array('1',            'lx'),
        'METERCANDLE'             => array('1',            'metercandle'),
        'MILLIPHOT'               => array('10',           'mph'),
        'NOX'                     => array('0.001',        'nox'),
        'PHOT'                    => array('10000',        'ph'),
        'STANDARD'                => 'LUX'
    );
}