Michael Herf
mherf.bsky.social
Michael Herf
@mherf.bsky.social
I make f.lux (lighting and screens) and do research on sleep and circadian neuroscience, color, and vision. Previously: Picasa (founding CTO), Google, MetaCreations, Microsoft, CMU.
As well, papers that need blue light to penetrate deep into tissues for the mechanism to work... well blue light doesn't do that.
December 3, 2025 at 4:15 PM
Lots of higher-quality older work that says the closer to green you get, the more you induce sleep/torpor. And also that mice experience "aversion" to blue light and reduce activity. So shining bright blue on mice is not a good model of people or mitochondria.

journals.plos.org/plosbiology/...
journals.plos.org
December 3, 2025 at 4:14 PM
👏 Ceiling lamps light up paper but windows light up retinas
August 2, 2025 at 4:44 PM
illustrating how mDFD can apply directly to a dose-response for a "brighter" light
July 30, 2025 at 4:41 PM
Agreeing that we need better names, I would add that it bugs me when people say the human L-cone peak is "red". It looks to me much more like "yellow", and then it's only via L-M opponency that we get the "red" color response?
May 9, 2025 at 4:18 PM
I am so sorry. 💔
April 1, 2025 at 5:06 AM
This is a business model problem. Supporting a niche device for a long time is very expensive.
March 13, 2025 at 7:32 PM
Yet to come, I will post a followup when I have it.
February 12, 2025 at 9:36 PM
LLMs train with trillions of tokens to do something akin to “brainstorming” but then we try to do safety/inhibition with a few paragraphs of system prompts? Think about all the corrections you get in high school, it’s more than a paragraph.
January 5, 2025 at 5:05 PM