What is considered a "normal" safe reading?
1717012
Typical background exposure is 3.3 mSv per year. This can vary some with location. There really is no "safe" level of radiation for long term exposure. It's all a matter of probability of getting cancer. Even normal background radiation produces cancer cases. Obviously more exposure leads to a greater chance of getting cancer. Short term exposure less than .2 Sv generally dose not produce any acute illness. At 1 Sv you start to see blood structure changes. More than 5-6 Sv you are dead.
475326
No not a bit, they were able to set it low enough to be easily read yet out of the range of vision for normal viewing. I really like mine.
2256943
You most certainly can read by this light only - as long as it is high enough so that the light shines downward on what you're reading. I'm not sure if it's a healthy way to read but it can be used for reading...
1922620
I did not read anything over refridgerating but I guess it can't do any harm
2219168
Hard to say. Depends on the text and font. I would guess 50 to 75 plus I never have kept track.
564779
I would say it is ok for reading, it seems better suited as a night light or bathroom trips
435697
It reads out in both ive used it and its pretty reliable. Remember to keep an extra scale so u can have a system of checks and balances. And happy reloading.
2239023
I would recommend that you wait until the child has a good grip on reading. There is a lot of text.
824962
Good question, if you find out let me know. I just put a small reader's digest in front so it won't bother us in the bedroom.
1603701
What activity are you doing when "it starts reading"? 78-80 bpm seems pretty reasonable for a relatively fit person to exhibit when they leisurely walk across flat ground. That's where mine starts reading after I walk from my house to my garage and get ready to start my bike ride. My resting heart rate is about 51 bpm (just before I get out of bed). You can verify the accuracy by feeling your pulse with your index finger on your jugular, counting the number of beats in 10 seconds and then multiply that by 6. I routinely check my timex monitor like this and it's pretty bang on accurate. The only time it's not accurate is when I ride my bike in sub zero weather.
1976423
Yes, works fine. So do other readers. Cool reader is a nice one and there is fbreader, ireader, aldiko and others.
1541349
I haven't had any problems with it. However, I haven't tried reading in really bright sunlight.
254658
Probably about 30-35 degrees from upright. Not as far as a standard recliner, but it reaches a comfortable reading position.
1950510
I am 84 and I can read them. They are not super large, but big enough for me.
1006883
I did not have a problem with mine. If you are not in direct sunlight it should be easily readable.
412694
I don't know...I gave it to my brother for a gift. I don't think he has one of those readers.
1737701
I'd say the levels are about 30, 45, 70, 80 degrees. When I use it to read, I typically use the 45 degree option. Hope that helps