Many people like to use their phones or tablets at night before they go to sleep. However, the light from mobile devices can interfere with sleep. But not all light carries the same risk. Recent studies have shown that within the light spectrum, blue light can have the worst effect on sleep. A study in the UK showed that blue light actually can keep sleepy people awake. Tired drivers who were exposed to blue light became as alert as those who drank two cups of coffee. Blue light filters have been developed for mobile devices to help with sleep issues. Apps are available for Android devices that filter blue light on screens. Updates to the iPhone, iPad and Amazon Fire tablet have added blue light filters. Twilight is a free app that filters blue light on Android device screens. It can be set to turn on by itself. Or users can turn it on and off when they want. In the app settings, you can change the intensity of the filter, the color and the time the filter turns on and off.
Title: Filter Blue Light for Better Sleep
Content: <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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