<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category  Zend

 * @package   Zend_Measure

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license   http://framework.zend.com/license/new-bsd     New BSD License

 * @version   $Id: Illumination.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * Implement needed classes

 */

require_once 'Zend/Measure/Abstract.php';

require_once 'Zend/Locale.php';

/**

 * Class for handling illumination conversions

 *

 * @category   Zend

 * @package    Zend_Measure

 * @subpackage Zend_Measure_Illumination

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

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';

    /**

     * Calculations for all illumination units

     *

     * @var array

     */

    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'

    );

}