Daily Logs for Aug 16, 2025
Tags: gunnar blue light online
Dear Vishi, my logs for today.
Gunnar Glasses
I accidently ordered glasses using my credit card. Since I have a doctor's prescription, I should have used HSA card.
There is a contact page where you can cancel an order. Not sure if this would refund the amount.
I also dropped an email to support@gunnars.com
Understanding Blue light from Computer
Visible light is all the light wavelength we can see with our eyes. e.g.
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Red: ~620–750 nm (longest wavelength, lowest frequency)
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Blue: ~450–495 nm
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…
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Violet: ~380–450 nm (shortest wavelength, highest frequency)
Blue wavelengths—which are beneficial during daylight hours because they boost attention, reaction times, and mood—seem to be the most disruptive at night 1. Few suggestions
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Use dim red lights for night lights. Red light is less likely to shift circadian rhythm and suppress melatonin.
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Avoid looking at bright screens beginning two to three hours before bed.
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If you work a night shift or use a lot of electronic devices at night, consider wearing blue-blocking glasses or installing an app that filters the blue/green wavelength at night.
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Expose yourself to lots of bright light during the day, which will boost your ability to sleep at night, as well as your mood and alertness during daylight.
Why does computer produces lot of blue lights? Screens produce a lot of blue light mainly because of how LEDs work. White light from LEDs is made by blue light + phosphor, not by blending all colors equally. This makes the blue spike stronger than in natural sunlight.
Online
Saw this tweet2 from Tulsi Gabbard:
To all celebrating Janmashtami around the world, I send you my aloha and best wishes on this most auspicious day. Jai Sri Krishna!
yfinance too many request
I was getting following error with the library
yfinance.exceptions.YFRateLimitError: Too many Requests. Rate limited. Try after a while
Upgrading the library fixed the issue
pip install --upgrade yfinance
Footnotes
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