_:n1a22901d41ca48799f754a959e69ecafxb29
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"<blockquote class=\"uncited\"><div><p><a href=\"https://ledstrain.org/d/1547/14\" class=\"PostMention\" data-id=\"20685\" rel=\"\" target=\"\">ryans</a> It uses PWM I suspect.</p></div></blockquote>\n\n<p>I read a few times at dusk and got a bit of headache as it was hard to see anything. I will check, though.</p>\n\n<p>I did not know Kindle used a back light. I thought there were LEDs on the sides of the frame eventually. Is yours a PaperWhite?</p>\n\n<p>If there is a back light, yeah, then it could be that an update manages power consumption differently. That is the first thing I can think of when it comes to a Kindle update. I hope it was just a font change though!</p>"
<https://ledstrain.org/d/1547/1>