yeutterg

13 ms·

91.
by yeutterg 8y ago
We never published it (just internal market research), but that result was based on about 500 responses. We controlled for the typical demographics.
92.
by yeutterg 8y ago
It's not really a night light. More like a before-bed and wake-up light. While they don't publish the brightness, I asked Casper support, and they said it is about 375 lumens, which seems right anecdotally (I don't have an in
93.
by yeutterg 8y ago
Yep, check out a few of the studies referenced at the bottom of f.luxometer: https://fluxometer.com/rainbow/
94.
by yeutterg 8y ago
I totally agree the dim to dark is an amazing feature before bed. I just wish they would use something better than a 2700K LED if it's supposed to be used in the 15-45 minutes before sleep. In my opinion, if people are able to sleep in
95.
by yeutterg 8y ago
That's odd—I haven't left it on long enough to notice. So they really intended this light to be used for short time intervals.
96.
by yeutterg 8y ago
Thanks for the clarification, Michael!
97.
by yeutterg 8y ago
We did a lot of research on this, and fewer than 5% of people studied (Americans of various socioeconomic status) had dimmers in their bedrooms.
98.
by yeutterg 8y ago
One thing to point out is that the circadian rhythm is (largely) not directly influenced by the cones or rods (to our current knowledge). It is a third set of photoreceptors, the ipRGCs, which detect blue/green light and provide input
99.
by yeutterg 8y ago
As a counterpoint, it is easy to spend more than $90 on a "dumb" lamp and bulb, depending on your style preferences and where you shop. There will always be a market for higher-end products. Another way to look at this is Casper&#
100.
by yeutterg 8y ago
In simple terms, both blue and green light contribute equally to circadian interruption. The graph itself is a comparison of spectral power distributions among several light sources. It's basically the signature of the light source, sh
101.
by yeutterg 8y ago
I bought one, as I sell a product with a similar use case [0]. My impressions: The overall concept is great. The UX is cool, but some of the UX choices are strange to me. For example, automatically dimming down when you turn the light on (y
102.
by yeutterg 8y ago
This is a huge problem and major source of frustration for legitimate sellers on Amazon. I've had it happen and had to threaten legal action to get a fraudulent seller off of my listing.
103.
by yeutterg 8y ago
Amazon seller here. It is against the terms of service to ask for positive reviews. It is also against TOS to offer a free product in exchange for a review. You can, however, ask customers for a review in a neutral way. For example, "W
104.
by yeutterg 8y ago
After reading this thread yesterday, I had a nightmare in which I called 911 but was required to answer an endless stream of personal verification questions, never able to report the problem.
105.
by yeutterg 8y ago
Sounds like Dell. No matter, glad you were able to survive through the reorgs.
106.
by yeutterg 8y ago
Two important factors not mentioned in the section "So what actually works...?", but potentially in the book (I didn't read it), are getting adequate sleep and alternating vigorous activity with rest (or slow exercise like wa
107.
by yeutterg 8y ago
So glad this was useful! Please let me know if there's anything else I can help with lighting-related. I'm super easy to find.
108.
by yeutterg 8y ago
Theoretically, they could, but I don't think Philips really has a financial incentive to update anything that "already works"
109.
by yeutterg 8y ago
Haha, totally agree! If you are still in the market for a low-blue, low-flicker solution, may I humbly suggest a look at my product, Bedtime Bulb [0]? I know I basically bashed the Soraa product here, but not without technical justification
110.
by yeutterg 8y ago
When I refer to % flicker, I am talking about the modulation % as defined by IEEE 1789-2015 and some documentation from the Illuminating Engineering Society [0][1]. More correctly, invisible flashing is known as the stroboscopic effect or p
111.
by yeutterg 8y ago
Some people are talking about using LiFi or high-speed IR communication for vehicle to vehicle communication. Seems like a great idea, but you can do it at a much higher frequency than what GM is doing today, so it's not distracting to
112.
by yeutterg 8y ago
The Soraa bulb looked pretty sinusoidal on my scope when I tested it briefly. But it's a lot of flicker regardless. What's interesting is that the bulb seems to have a nice build quality (from the outside, I didn't open it) a
113.
by yeutterg 8y ago
Agreed. Most car manufacturers' LEDs flicker (just look at any slow-motion video, such as those on Top Gear or The Grand Tour), but GM's are at a much lower frequency that is visible if the vehicle is in motion, or you are in moti
114.
by yeutterg 8y ago
I've tested a bunch of bulbs for flicker with a handheld flicker meter and with a photodiode connected to an oscilloscope. It's funny that some of the bulbs out there claiming to be "healthy" have terrible flicker. One p
115.
How to grow fast without VC funding(underwire.works)
5 points by yeutterg 8y ago|0 comments
116.
by yeutterg 8y ago
Same here, I didn't fully grasp the meaning from the article. Despite some of the skeptics' comments here, what I find fascinating is that we have a subject that could include a variety of situations (poor and living on the street
117.
by yeutterg 8y ago
Haven't heard it used much, but it makes total sense. Thanks!
118.
by yeutterg 8y ago
Totally agree, I just wanted to point out that a lot of Americans probably wouldn't click on the article in the first place from the headline alone
119.
by yeutterg 8y ago
Some digital nomads classify themselves as homeless, although it's a bit tongue-in-cheek as they are clearly of a different socioeconomic status. At least for me, when I hear the word homeless I first think of someone living on the str
120.
by yeutterg 8y ago
Point taken and appreciated. I agree that homeless is a bit of a catch-all, but I'm not sure that we have any equivalent phrase to rough sleeping in the US (at least on the East Coast). When I hear the word homeless, I first think of p

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