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Someone should probably start a bright home lighting company (2019)

lincolnquirk.com

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Re: Someone should probably start a bright home lighting company (2019)

#221

Post by BizarroLand »

underwater wrote: post #45
leobg wrote: post #12

DIY Perks [1] has a good tutorial on how to make a super bright LED panel from LED strips. Quite easily, actually. Been using one of those in my office for the last eight years or so. I use a server PSU for power. I was surprised to see how bright it is when I once went outside while it was on. Not only was my window the brightest in the entire street by far. But it actually illuminated the trees around my window. If…

He also created a version that simulates sunlight: https://www.youtube.com/watch?v=6bqBsHSwPgw

You should also take into account the costs associated with running and powering the COB led he used for that sun light.

https://www.youtube.com/watch?v=bBV-1VNWscA

Re: Someone should probably start a bright home lighting company (2019)

#222

Post by JKCalhoun »

_greim_ wrote: post #208
JKCalhoun wrote: post #190

Earlier quoted context omitted.

> Even high-end bulbs flicker badly when dimmed. Dimming is crap. I'll go so far as to say it causes subconscious anxiety and stress — obviously negating any positive effect the light brings. I rotate my hands quickly between my eyes and the lights when I'm at a store to look for strobing when dimmed. Any strobing and I am not on board. > Maybe flickering all the LEDs in the array with different phases would fix this…

> Dimming is crap. Agreed LED dimming is crap, but incandescent is not so bad. Mainly because it dims toward red, simulating the day -> sunset -> fire transition. Apart from flickering, my gripe with LED is that it stays a constant color which looks unnatural even with a 2700K bulb.

That's interesting: trying to track the color temperature curve as the bulb dims.

Re: Someone should probably start a bright home lighting company (2019)

#223

Post by BoxOfRain »

egypturnash wrote: post #201

When I lived in Seattle, my solution was a 2’ square fluorescent panel I got from a gardening supply place called “The Indoor Sun Shop”. I grew up in the South and got real bad seasonal depression up there; it probably saved my life. I paid all of $300 for it. Plus like twenty bucks for a mechanical timer, because I discovered that there were a lot of mornings where I was too depressed and mopey to turn it on myself.…

I wonder how much the traditional British pessimism has to do with the fact our winters are an SAD magnet if there ever was one, very short days due to the high latitude and the kind of grey soul-penetrating dampness of it being just cold enough to make you miserable but not cold enough for the ground to ever properly freeze for long. I definitely found taking vitamin D supplements helps with the seasonal blues, I'd try a daylight simulating lamp but I have quite severe photophobia issues.

Re: Someone should probably start a bright home lighting company (2019)

#224

Post by thaeli »

formerly_proven wrote: post #93
nine_k wrote: post #76

Earlier quoted context omitted.

"Warmth" and "naturalness" are produced by high CRI index (90+). I have 8 lamps with CRI 90+ in my living room, at 5000K color temperature, 1500 lumens each. They produce nice light that seamlessly mixes with daytime sunlight from the window: they seem to have the same color. I also have a few LED strip installation over desks and tables, very bright at max dimmer setting. A diffuser is a must, even though it lowers…

Quick guide to CRI 90-95: Can be ok, or not. Depends. Different lights will likely not mix at the same color temperature. 98: Good 99-100 full spectrum cyberlight: As good as Halogen and only ~30x as expensive.

R9 is also important in the higher CRI ranges. CRI is based on pastels - it's an artifact of measuring traditional florescent bob performance - and R9 captures the vivid reds that are important to truly accurate color rendition.

Re: Someone should probably start a bright home lighting company (2019)

#225

Post by BizarroLand »

michaelt wrote: post #189
unglaublich wrote: post #35

This has been applied for decades. Those 'ceiling windows' in art galleries are often false windows with bright daylight lamps beneath it. By the way, the sun produces ~50.000 lux on earth's surface. That's 100 times more than in a wall illuminated office. To reach that brightness, you would need tens of kilowatts of LED lightning for medium and larger sized rooms. That's totally infeasible. Also, imagine the heat bu…

'Overcast February day in London' is only 5,000 lux at the surface, according to my lux meter. You could achieve that with 750W of LEDs. Of course, that is still quite a lot of power.

Depends on distance. They make e27 screw in LED bulbs that will put out over 5,000 lux but you would need to hold the bulb pretty close to your face to get the full value of it.

Re: Someone should probably start a bright home lighting company (2019)

#227

Post by seltzered_ »

I used to think about this deeply, and have flipped the idea around - why can't we be doing more work (including writing and other computer work) outdoors?

As a start, I've started https://www.reddit.com/r/ErgoMobileComputers/ and been going on stretches of doing laptop work outside more. By having a setup where you've either got the screen closer to the face (less glare) or an e-ink display, I've managed being outside for up to a few hours.

Re: Someone should probably start a bright home lighting company (2019)

#228

Post by quwert95 »

UnpossibleJim wrote: post #220
quwert95 wrote: post #219

Very related to this, I've been trying to relocate a video about "making a sun in a box" where the creator does the following: - goes over power and lumens, basic wiring for a bare LED. - details how the color of light matters. - instructs how to measure the focal length of a fresnel lens for parallel light rays. - how to make an appropriately sized box that can be stacked in both directions to crate a "window" effec…

This isn't quite what you're looking for, but this has some of what you're looking for, which is how to get the "parallel light effect" that the sun has, so it doesn't look like a bulb, and diffuses properly: https://youtu.be/6bqBsHSwPgw Hope this helps a little.

It's not the video, but it certainly has some of what I am looking for. Thank you; it's appreciated.

Re: Someone should probably start a bright home lighting company (2019)

#229

Post by genewitch »

egypturnash wrote: post #201

When I lived in Seattle, my solution was a 2’ square fluorescent panel I got from a gardening supply place called “The Indoor Sun Shop”. I grew up in the South and got real bad seasonal depression up there; it probably saved my life. I paid all of $300 for it. Plus like twenty bucks for a mechanical timer, because I discovered that there were a lot of mornings where I was too depressed and mopey to turn it on myself.…

there was a post a day or two ago about vitamin D3, as well as academic literature finally catching up to medical science vis a vis vitamin D3.

I won't cite, but only because i don't have a way to index my personal PDF repository, but the common consensus among people who study such things is that anyone living above the 20th parallel (or below, technically) absolutely must supplement vitamin D3, as even a full day in the sun naked is not enough to synthesize the amount of D3 we need.

So with that in mind, I'd honestly expect more people to know this and be supplementing D3. I don't have any specific recommendations, but i do know some guidelines and recent discoveries into "max dosing", so here they are. Anecdotally, i take 5000-6000iu every two days. I have a weird sleeping schedule so i really only notice "a day" as the sort of fog and fatigue i get after having gone more than 30 hours without D3. Prior to about 2015 or so, the max dosage was in the sub-5000iu range, with most supplement's labels stating that 500-1000iu was the "RDA" for D3.

However since covid was exponentially responsible for research into literally anything that could help alleviate symptoms/the disease and accelerate the time to recovery, some doctors were giving extremely high iu, up to 250,000iu over the course of a few days, or single doses of 50,000-80,000iu, with no deleterious effects reported.

Personally, unless i actually get sick, i try to stay under 8000-10000iu, at least until someone does a longitudinal study about the long term effects of doses higher than that.

As to the article and your point about lights helping - i've never noticed anything about any sort of light. I can feel awful at noon on a clear day while outside, or awful inside under every light type imaginable. I'm glad that light (and types of lights) help some people. I just think that the root cause is D3 deficiency, and no amount of 20k lumen arrays is really going to help.

As a quick aside, if you want to supplement children with D3 i recommend finding chewable d3 or a childrens multi-vitamin with omega-3/6 fatty acids. A couple of studies (with decent N and correlations) showed that merely supplementing omegas in children's diets improved the relationship and overall wellbeing of the children's parents - you read me right, parents didn't have to supplement to get the benefits of the children supplementing.

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