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<div id='article-page'><div id='article-content' data-media-url='//news-app-staging.s3.amazonaws.com' data-base-url='//news-app-staging.herokuapp.com' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/blue_audio.m4a' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='Filter Blue Light for Better Sleep' data-article-id='1520'><script src='//news-app-staging.herokuapp.com/javascripts/getscripts.js'></script><link rel='stylesheet' href='//news-app-staging.herokuapp.com/stylesheets/article.css' type='text/css' /><div class='article'><p><span data-start-time='0' data-end-time='7396'>Many people like to use their phones or tablets at night before they go to sleep.</span> <span data-start-time='7396' data-end-time='13729'>However, the light from mobile devices can interfere with sleep.</span> <span data-start-time='13729' data-end-time='17521'>But not all light carries the same risk.</span> <span data-start-time='17521' data-end-time='27083'>Recent studies have shown that within the light spectrum, blue light can have the worst effect on sleep.</span> <span data-start-time='27083' data-end-time='35500'>A study in the UK showed that blue light actually can keep sleepy people awake.</span> <span data-start-time='35500' data-end-time='46042'>Tired drivers who were exposed to blue light became as alert as those who drank two cups of coffee.</span> <span data-start-time='46042' data-end-time='53854'>Blue light filters have been developed for mobile devices to help with sleep issues.</span> <span data-start-time='53854' data-end-time='60896'>Apps are available for Android devices that filter blue light on screens.</span> <span data-start-time='60896' data-end-time='68479'>Updates to the iPhone, iPad and Amazon Fire tablet have added blue light filters.</span> <span data-start-time='68479' data-end-time='75667'>Twilight is a free app that filters blue light on Android device screens.</span> <span data-start-time='75667' data-end-time='79063'>It can be set to turn on by itself. </span> <span data-start-time='79063' data-end-time='84167'>Or users can turn it on and off when they want.</span> <span data-start-time='84167' data-end-time='93625'>In the app settings, you can change the intensity of the filter, the color and the time the filter turns on and off.</span> </p></div><div class='control-buttons-sticky' style='display:none;'><div class='control-buttons'><button title='Back' class='back' disabled='disabled'></button><button title='Play' class='play' disabled='disabled'></button><button title='Pause' class='pause' style='display:none;'></button><button title='Forward' class='forward' disabled='disabled'></button><button class='finished-reading' style='display:none;'>Done</button></div></div></div><div id='article-media'><div id='media-image'><img src='https://news-app-production.s3.amazonaws.com/articles/1045/blue_img.jpg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=6136 data-hint-location='35500' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/what_does_expose_mean.m4a'>What does expose mean?</div><div class='choices' data-correct-choice='to cause someone to experience something'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/true_or_real.m4a'><span>true or real</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/to_cause_someone_to_experience_something.m4a'><span>to cause someone to experience something</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/colors_that_a_ray_of_light_can_be_separated_into.m4a'><span>colors that a ray of light can be separated into</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/a_computer_program.m4a'><span>a computer program</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=6137 data-hint-location='17521' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/what_type_of_light_can_have_the_worst_effect_on_sleep.m4a'>What type of light can have the worst effect on sleep?</div><div class='choices' data-correct-choice='blue'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/green.m4a'><span>green</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/infrared.m4a'><span>infrared</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/blue.m4a'><span>blue</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/orange.m4a'><span>orange</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=6138 data-hint-location='7396' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/light_from_mobile_devices_can_interfere_with__blank_.m4a'>Light from mobile devices can interfere with <span class='blank'>sleep</span>.</div><div class='choices' data-correct-choice='sleep'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/sleep.m4a'><span>sleep</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/eating.m4a'><span>eating</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/brain.m4a'><span>brain</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/1045/exercise.m4a'><span>exercise</span></div></div></div><div class='question-buttons'><button class='skip-button'></button><button class='hint-button'></button><button class='speak-button'></button></div></div></div>

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