yeutterg

12 ms·

61.
by yeutterg 7y ago
Working on the problem of "blue" light affecting circadian rhythms and sleep. We launched our MVP, Bedtime Bulb [0], in 2018, and it's now the most popular product in the category. We're expanding out of North America to
62.
by yeutterg 7y ago
Definitely! That's where I want to take the series, to talk about the modern health, safety, quality of light, and light pollution concerns. So I appreciate that feedback. Regarding 5000K fluorescent vs. LED, actually the fluorescent w
63.
by yeutterg 7y ago
I recently decided to start a new video series on the modern history of light. You may be surprised to learn that street lighting (as we know it) was relatively uncommon until the mid 1800s. Up until about 200 years ago, new lighting techno
64.
Gas Lights: How We Erased Darkness from the Night [video](youtube.com)
2 points by yeutterg 7y ago|3 comments
65.
by yeutterg 7y ago
If your TV doesn't have any specific blue light settings, you can get an external device like driftTV[0]. Even without a specific blue light reduction mode, I recommend turning down the brightness to the lowest comfortable setting. [0]
66.
by yeutterg 7y ago
Me as well. FastLED was the main reason I was able to complete a holiday window display for a prominent NYC retailer, with a very limited budget, and only 2.5 weeks to do the project. I really pushed the library to the limits, as we had mor
67.
by yeutterg 7y ago
Rear fog lights: something more cars should have in the US for this exact situation.
68.
Apple subsidiary FileMaker renamed to Claris, new apps coming(theverge.com)
3 points by yeutterg 7y ago|0 comments
69.
by yeutterg 7y ago
My understanding is that it's still up for debate how linear or nonlinear melanopic sensitivity is, which is the main thing we are attempting to show in the plot.
70.
by yeutterg 7y ago
Their non-dimmable filament bulbs (silver base) tend to be pretty low flicker, but I found the dimmable ones (gold base) have upwards of 30% flicker, even at full output. Without having done a teardown, I suspect the flicker is due to the p
71.
by yeutterg 7y ago
The main purpose of this graph is to compare "melanopic" light, which is light in the blue-green area between about 400 and 580 nm (the gray curve). This is the sleep-disturbing blue light everyone is talking about, which also inc
72.
by yeutterg 7y ago
Related: Signify (formerly Philips Lighting) recently lost a judgment by the U.S. International Trade Commission on their patent licensing program [0]. Lighting companies that have fought patent infringement claims against Philips/Sign
73.
by yeutterg 7y ago
Adding capacitance to a "linear" driver design is one way to reduce modulation, with some tradeoffs. There are other power supply designs, such as switch-mode and several variations of "constant current" drivers, which c
74.
by yeutterg 7y ago
Not all filament designs have horrendous flicker—we are selling one that we designed with 8% worst case, usually more like 2-3% [0][1]. That's better than incandescent. Even the normal non-filament LED bulbs can have high levels of fli
75.
by yeutterg 7y ago
There are still BP-branded stations in the Philadelphia area, to the best of my knowledge. Maybe elsewhere too.
76.
by yeutterg 7y ago
BP has gas/petrol stations, so close enough?
77.
by yeutterg 7y ago
I see oarsinsync posted this comment: >The downside is every single thing you do is logged and tracked against your card, and associating a card with an individual is just one MTR ride with facial recognition away. Possible, although fac
78.
by yeutterg 7y ago
As a frequent visitor to HK and Octopus Card holder, I don't believe I ever had to present ID to obtain my card. I just purchased it with cash at the Airport Express counter. Is it different for HK citizens?
79.
by yeutterg 7y ago
I've been using Fi for 3 years. CS has always been hit-or-miss in my experience, but it has gotten worse now that there are a lot more subscribers (thanks to iPhone support and the massive Pixel 3 promo they did last year). They tend t
80.
by yeutterg 7y ago
Can confirm. At first, I thought it was only calls to Canada from the U.S. Now I am only able to get through intermittently, Canada or not.
81.
DJI drones helped track and stop the Notre Dame fire(theverge.com)
5 points by yeutterg 7y ago|0 comments
82.
by yeutterg 8y ago
If it's the company bus, does that mean you are on company property?
83.
by yeutterg 8y ago
Disclosure: I design and sell lighting products. The LED component probably will last 60 years (8 hours a day). My guess is they are using Nichia LEDs, which tend to have an L70 (lifetime at which the brightness stays above 70% of the origi
84.
Dyson Lightcycle Task Lamp(dyson.com)
26 points by yeutterg 8y ago|58 comments
85.
by yeutterg 8y ago
Can confirm. Also, API integrations, such as Buffer, are not working.
86.
by yeutterg 8y ago
> empowerement that means more responsibility and no leverage Wow, that so succinctly summarizes how I've felt at more than one workplace
87.
by yeutterg 8y ago
You're referring to 3-way, I think. I think most people would classify that as a dimmer.
88.
by yeutterg 8y ago
It did, and it actually does have a circadian effect. But it has much less illuminance than most artificial light sources. That's what I mean when I say "little nighttime light."
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by yeutterg 8y ago
It will be in a few months. Shoot us an email and we'll make sure you're aware of the launch: hey AT bedtimebulb DOT com Thanks!
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by yeutterg 8y ago
I'm not a doctor, but we know about the negative effects of light on sleep. Our species evolved with little nighttime light, and we know the mechanism by which our circadian rhythms are tricked by artificial light. Most sleep experts (

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