211–220 of 243 posts
Earlier quoted context omitted.
Yep, that was my first assessment. Cant call it sun without NIR.
Can't call it sun without gravitational confinement nuclear fusion either.
Might be useful for psoriasis treatment?
I cannot remember if I first saw this here on HN but, here is a detailed video of an incredible artificial sunlight rig build. It's big but the results look, well, amazingly real, at least to the camera. https://www.youtube.com/watch?v=6bqBsHSwPgw
This was referenced in the article.
Very cool. I’m the CEO of Innerscene ( https://innerscene.com ) and we make a commercial artificial skylight that uses some of these concepts. Actually the coelux ht25 model is almost identical to what you made but using smaller lenses and more LEDs - however the effect they were able to achieve still isn’t that great, the sun looks like a giant orb and once you get a few feet away you can make out a sun at all. We s…
Are you guys looking at fabbing your own LED dies? The actual spectrum of commercial LEDs is all over the place when you start measuring it it with a spectrometer, even when they supposedly have a high CRI. Especially if you want some temperature that isn't 6500K. It was so bad that when I was building a night light for my eink desktop I ended up using halogen bulbs which I could undervolt. The main issue was that I…
Very cool. I’m the CEO of Innerscene ( https://innerscene.com ) and we make a commercial artificial skylight that uses some of these concepts. Actually the coelux ht25 model is almost identical to what you made but using smaller lenses and more LEDs - however the effect they were able to achieve still isn’t that great, the sun looks like a giant orb and once you get a few feet away you can make out a sun at all. We s…
I never heard of this concept until this post, maybe because I live in a sunny country (Brazil) but I can totally see the use case for countries in higher latitudes, as the sun setting at 3pm mist be quite depressing for people. I wonder if you guys did any research on the effects of having your product in these countries. How much would the impact on well being be?
The light here looks really good, but the cheaper (less nicer) alternative is just a powerful (natural) LED light - search for SAD lights
Earlier quoted context omitted.
Then you waste a ton of energy on the conversion and still have the same problem. You won't ever get two regulators at exactly the same voltage. One will always take most of the load. You get around this with load balancing resistors, but that comes with its own set of problems. The way you get around that is to chop up your load into multiple independent power domains. That way each segment is powered exclusively by…
I meant in parallel so both positive terminals are connected to the regular in one node
Very cool. I’m the CEO of Innerscene ( https://innerscene.com ) and we make a commercial artificial skylight that uses some of these concepts. Actually the coelux ht25 model is almost identical to what you made but using smaller lenses and more LEDs - however the effect they were able to achieve still isn’t that great, the sun looks like a giant orb and once you get a few feet away you can make out a sun at all. We s…
I never heard of this concept until this post, maybe because I live in a sunny country (Brazil) but I can totally see the use case for countries in higher latitudes, as the sun setting at 3pm mist be quite depressing for people. I wonder if you guys did any research on the effects of having your product in these countries. How much would the impact on well being be?
https://www.innerscene.com/papers/lux-vs-wavelength-in-light...
Because we recreate the blue sky there is a lot of light in this spectrum
Very cool. I’m the CEO of Innerscene ( https://innerscene.com ) and we make a commercial artificial skylight that uses some of these concepts. Actually the coelux ht25 model is almost identical to what you made but using smaller lenses and more LEDs - however the effect they were able to achieve still isn’t that great, the sun looks like a giant orb and once you get a few feet away you can make out a sun at all. We s…