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Thread: Blue Light and sleep
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08-06-2022, 09:37 PM #21
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The reading light starts as blue at first click then the second click gives you a white light. These are standard on our 2020 Imagine 2600RB. There is no way to turn off the blue light that I can find. I've looked at ours and short of replacing both reading lights.
Also, they are talking about extended exposure to blue light (when you are awake) prior to bed might be an issue. Just turning the light on and going blue then white is not the issue. Its longer exposure prior to going to bed. If you really worry about it, don't use a computer, don't watch your TV, don't use your phone 2 hours prior to going to bed. That is what the study found.
To quote Water Cronkite: " and that's the way it is".
A couple of years and no problems for us. We use the blue light as a night light for whoever is coming to bed later. Only thing is we wrap a hand around the light to block the white light as we double click--1 click blue to white, second click to off. If you don't know what the light looks like or understand the issue, view the picture in comment 14.Last edited by more tired since retired; 08-06-2022 at 09:40 PM.
2020 F-250 XLT SuperCrew 7.3L Blue Ox SwayPro, 2020 Imagine 2600RB,
1600W Solar w/525AH LiFePO4, Victron 3000W, Road Armor w/wet bolt suspension, VisionWork Camera System, Peplink MAX BR1 Pro 5G Mobile Router,MicroAir EasyStart
Amateur Radio Call N9XGZ FMCA#489460 Escapees SKP#166379
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08-07-2022, 07:30 AM #22
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Mine have the blue light that is always on also. I guess to help find the switch in the dark. But to comment on the initial question, we haven't noted any sleep deprivation due to the blue light.
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08-07-2022, 06:34 PM #23
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There have been many studies. I'll find more but for now: https://www.eurekalert.org/news-releases/960111
and: https://pubmed.ncbi.nlm.nih.gov/30311830/Joyful & Drake
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08-08-2022, 07:56 AM #24
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The "reading lights" on the older units (apparently your 2016 and my 2015 are the same) had the blue back light that was always on. There were a couple of threads back then about how to open the light fixture and cut a specific connection on the circuit board. Didn't do it myself but it didn't sound too tough if you are interested in shutting them off completely.
Jim (& Sharon)
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08-08-2022, 08:08 AM #25
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Maybe best to call these lights K-Mart Blue Light Specials!!
2020 F-250 XLT SuperCrew 7.3L Blue Ox SwayPro, 2020 Imagine 2600RB,
1600W Solar w/525AH LiFePO4, Victron 3000W, Road Armor w/wet bolt suspension, VisionWork Camera System, Peplink MAX BR1 Pro 5G Mobile Router,MicroAir EasyStart
Amateur Radio Call N9XGZ FMCA#489460 Escapees SKP#166379
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08-08-2022, 09:15 AM #26
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08-08-2022, 11:16 AM #27
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"Blue light" and blue colored lights are 2 different things.
https://www.healthline.com/health/wh...ght#what-is-itSteve- Inventory Manager at Tom Schaeffer's RV, Shoemakersville, PA www.tomschaeffers.com
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08-08-2022, 04:09 PM #28
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I would beg to differ. Blue light is light in a specific frequency band - no mater where it originates. Putting a blue filter over a broad-spectrum light source just filters out wavelengths other than blue. Blue paint reflects light in the blue band of the spectrum and not other light frequencies. Neurologically and physiologically, it's all the same.
RobU.S. Army Retired
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08-08-2022, 08:35 PM #29
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Studies using NASA satellite data underestimate total light because those satellites deliberately minimize blue light to reduce glare in their images. Still they show a correlation between brighter exterior light and several kinds of cancer including breast, prostate, colorectal, thyroid, and pancreatic cancer. One found differences between two neighborhoods in Tel Aviv that were similar socio-economically. The brighter neighborhood had higher cancer rates.
But this study below which specifically compares blue lit neighborhoods to warmly lit neighborhoods is the most compelling. Questionnaires on indoor light exposure were used to at least roughly factor that out. Breast, prostate, and colorectal cancers were all significantly higher in the blue lit neighborhoods and on a sliding scale. The worse the exposure, the higher the cancer rate. You can mitigate the risk with thick blackout shades. The mechanism is that all of these cancer tumors are suppressed or slowed by the presence of melatonin in the body and it is light in the blue part of the spectrum that most suppresses melatonin from being produced by the body. In nature, when the sun sets and blue light disappears at night, the body makes melatonin to signal sleep.
Report on blue light at night and breast and prostate cancer:
https://www.exeter.ac.uk/news/featur...655460_en.html
Two years the data from the same study was published for colorectal cancer:
https://www.nursinginpractice.com/cl...-bowel-cancer/
Dr. Qian Xiao is here in Houston at UT Health Sciences Center. Her studies have found considerably higher thyroid and pancreatic cancer rates in bright areas. Her large scale studies are correlation only but she also believes suppression of melatonin affects these cancers. She is definitely concerned about Houston's lighting, also as an environmental justice issue. Sleep deprivation plays a role in adolescent behavior and increased juvenile delinquency.
Light at night and thyroid cancer:
https://pubmed.ncbi.nlm.nih.gov/33554351/
Light at night and pancreatic cancer:
https://www.researchgate.net/publica...d_Health_Study
We have several concerned Houston City Council members. Visibility in Houston is terrible due to unshielded LED light. We have found it present facing the driver in many fatal auto-pedestrian accidents. A colleague in Kansas City said she went to a site and saw the same there. We are hoping this will have an impact...have sent our photos to city officials and the police chief. Both Chiefs Art Acevedo and now Troy Finner have taken our concerns seriously.
The solution is subdued shielded warmer light or no light when not needed combined with motion detection for any video camera light needed.Joyful & Drake
SE Texas
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08-09-2022, 09:00 AM #30
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Marcy & Gary
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