Hi there, I'm Greg, 26, from Philadelphia, USA. I stumbled on this forum from the Hacker News post today. This intro includes my story and some things I'm working on that you might be interested in.
My first word was "light." I've always been obsessed with lighting, and in college, I worked in a lab studying the links between light and health—mostly the effects of blue light on the circadian rhythm.
I started and sold the first circadian lighting controls company (f.lux for your lighting) and now I have a new healthy lighting company, SimpleBulb Inc. Our first product, Bedtime Bulb, is a low-blue and low-flicker light bulb for healthy sleep (more about this below).
While I don't notice any health effects from flicker/dithering, I can perceive it often and find it quite annoying. I used to get dizzy with CRT monitors/TVs, although I don't seem to have that problem with LCDs and LED lighting/backlights. It is unfortunate that most of the "vintage-style" LEDs preferred by restaurants use cheap drivers that flicker like crazy! Additionally, flicker totally messes with my photography/videography.
What I'm working on:
Bedtime Bulb: The light bulb for healthy sleep. This is a light you use in the evening before bed. It has less sleep-distrurbing blue/green light than any other "low-blue" product on the market. It also has better flicker than other "flicker free" light bulbs: rated at <1% at 120 Hz, although every Bedtime Bulb we have tested clocks in at <0.1%. [Side note: Did you know that lighting can have up to 30% flicker and still claim to be flicker-free?]
You can learn more about Bedtime Bulb at https://bedtimebulb.com/ It is available in the U.S. and Canada on Amazon. We (SimpleBulb Inc.) are looking to make more healthy lighting products—please let me know what you would find useful!
Beautiful Photometry Library: I was unhappy with all the photometric calculation tools out there, and the graphs most of them produce are just plain ugly. I have been working on a Python library that generates great-looking SPDs and also calculates a bunch of relevant lighting specs. You can see some examples of the SPDs it generates in this post: https://medium.com/simplebulb/its-not-just-blue-green-light-also-disrupts-sleep-1cc2c65cbc26
The Beautiful Photometry Library is a work in progress. It definitely has bugs, and I'm sorry the documentation is not great at this point. But if you want to check it out regardless, head over to https://github.com/yeutterg/beautiful-photometry
Finally, you may be interested in a recent podcast I was interviewed on about healthy lighting: Episode 36 on this page: https://bedtimebulb.com/ror