Fact check: Post Title: Can't get any blue light filters working Post Content: I'm running standard Raspberry Pi OS with an XFCE desktop on a RPI5. Redshift doesn't work since it can't get location data and manually enabling it in the terminal does nothing f.lux doesn't appear to exist, nor does sct. I'm totally at a loss. Comment Chain: 1. Wasn't the whole blue light thing dismissed as nonsense quite thoroughly several years ago? Original Reddit link: https://www.reddit.com/r/raspberry_pi/s/VIiVWwe00V

1. Summary of the results

The scientific evidence regarding blue light's effects is more nuanced than a simple "dismissed as nonsense". While Harvard researchers have demonstrated that blue light can significantly affect circadian rhythms and melatonin production, with potential links to various health issues ^[1], the effectiveness of blue light filtering solutions shows mixed results. A systematic review found no conclusive evidence that blue light filtering lenses provide significant benefits for visual performance, eye strain, or sleep quality ^[2].

2. Missing context/alternative viewpoints

Several important aspects need consideration:

• Specific applications show promise: While general blue light filtering may have inconclusive results, specific applications like intraocular lenses have shown potential benefits in reducing glare under certain conditions ^[3]
• Neurological effects: Recent neuroimaging research has identified subtle but measurable effects of multi-color light filtering glasses on brain activity, specifically in reducing frontal beta wave activity ^[4]
• Health implications: The discussion goes beyond just eye strain - research has linked blue light exposure to broader health concerns including diabetes, heart disease, and obesity ^[1]

3. Potential misinformation/bias in the original statement

The comment suggesting blue light effects were "dismissed as nonsense" is oversimplified and potentially misleading. Several groups have vested interests in this debate:

• Healthcare industry: Benefits from selling blue light filtering products and solutions
• Tech industry: May benefit from downplaying blue light concerns as their devices are major sources of blue light exposure
• Research institutions: Harvard and others have demonstrated clear physiological effects of blue light ^[1], though the effectiveness of current filtering solutions remains under debate
• Consumer protection: The mixed evidence from systematic reviews ^[2] suggests a need for more careful marketing claims about blue light filtering products

The truth lies between complete dismissal and universal acceptance of blue light concerns, with solid evidence for physiological effects but ongoing debate about the effectiveness of current solutions.