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I tried making artificial sunlight at home

victorpoughon.fr

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Re: I tried making artificial sunlight at home

#81

Post by fouronnes3 »

reaperman wrote: post #79

I saw "artificial sunlight" and thought "oh wow I'd love to see the spectrogram of the lighting solution this person came up with". I was disappointed to merely see "CRI 95+". https://www.youtube.com/watch?v=lH_owRxupC0 This is great video on the shortcomings of "CRI" - it explains in detail CRI, CRI extended, TLCI, TM-30, and SSI. Brightness and color temperature are only two small parts of lighting - more people sh…

Do you have any insight on how to take spectroscopy measurements at home on a <1k€ budget? And how to select an LED manufacturing supplier when CRI is often the only thing available on the datasheet?

Re: I tried making artificial sunlight at home

#82

Post by paxcoder »

spl757 wrote: post #70

I'd be interested in seeing the optical spectrograph of the LEDs. If you want to simulate sunlight you want a full-spectrum LED like a Samsung LM301 series LED which are popular in grow lights. Not all LEDs are created equal, and even the LEDs in many "grow" lights only show two sharp peaks at red and blue wavelengths. A full-spectrum LED will output colors across the visible spectrum of light. You can't tell by look…

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Re: I tried making artificial sunlight at home

#83

Post by cannonpr »

jclarkcom wrote: post #19

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 adore the lights by your company, though they seem to be incredibly hard to source in general except for high end architectural projects. I wish there was an easier way to order them directly for DYI inclined engineers willing to pay the price.

Re: I tried making artificial sunlight at home

#84

Post by kulahan »

jclarkcom wrote: post #19

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…

It’s infuriating that you only have “accept all cookies” and no other options.

Oh but I do absolutely love this concept. I’m curious if you’ve had lots of interest from these billionaires building bunkers, if that story is even true!

Re: I tried making artificial sunlight at home

#85

Post by kulahan »

jclarkcom wrote: post #55
dan-robertson wrote: post #47

Earlier quoted context omitted.

Pricing is ‘contact us’ and going to be region-dependent. I would expect to pay ca $ 10^4.5 for a panel that produces the ‘virtual sun’ effect. Same goes for competitors (I know of Coelux but maybe there are others. Not sure how quality/price compares). But maybe GP will reply to you.

Yes, it’s region specific. In the USA sales generally go through a partner. But it is a fraction of the weight, depth, and cost of the large coelux units that run $40k plus install. We also realized there is a need for producing just the sky with great photo metrics and that is even thinner and less expensive. A lot of interesting reading can be found in our interactive spec sheet here: https://www.innerscene.com/pro…

Make them small, add heat, attack the pet market >:)

Re: I tried making artificial sunlight at home

#86

Post by jclarkcom »

cannonpr wrote: post #83
jclarkcom wrote: post #19

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 adore the lights by your company, though they seem to be incredibly hard to source in general except for high end architectural projects. I wish there was an easier way to order them directly for DYI inclined engineers willing to pay the price.

Yeah - channels can be a pain, reach out to me directly if you run into issues: Jonathan @ Innerscene

Re: I tried making artificial sunlight at home

#87

Post by mystified5016 »

brcmthrowaway wrote: post #51
Const-me wrote: post #35

Earlier quoted context omitted.

Personally, I would avoid it if possible. Even if they are of the same model, small discrepancies may cause their +12V to be slightly different. At the very least, will cause very non-uniform load distribution. Luckily, seems the OP only needs one. The current light only uses 36W @ 12V, even if they make the new light 10x more powerful, a single 400W PSU should do the job nicely.

What about wiring them in parallel with a voltage regular after.

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 one supply.

If you can't do that, you will always be better off with a single larger supply.

Re: I tried making artificial sunlight at home

#88

Post by izuchukwu »

sberens wrote: post #39

Really cool! I'm working on a lamp that gives you daylight levels of light indoors (albeit no raleigh scattering and columnated light). On the bright side (pun intended), it's 50,000 lumens instead of ~4500. https://getbrighter.com/

Had the chance to see one of these in person - did not believe you could achieve “daylight indoors” before I did.

Re: I tried making artificial sunlight at home

#89

Post by jclarkcom »

kulahan wrote: post #85
jclarkcom wrote: post #55

Earlier quoted context omitted.

Yes, it’s region specific. In the USA sales generally go through a partner. But it is a fraction of the weight, depth, and cost of the large coelux units that run $40k plus install. We also realized there is a need for producing just the sky with great photo metrics and that is even thinner and less expensive. A lot of interesting reading can be found in our interactive spec sheet here: https://www.innerscene.com/pro…

Make them small, add heat, attack the pet market >:)

Haha - actually one of our customers is a doggie hotel chain that has installed them in multiple locations

Re: I tried making artificial sunlight at home

#90

Post by nmarinov »

jclarkcom wrote: post #19

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…

Hi, I couldn't figure it out on your site but on the picture where you have your hand under the virtual sun[1], do you feel the warmth of the "sun" on your hand as you'd feel it with the real sun?

[1] - https://www.innerscene.com/_next/image?url=%2F_next%2Fstatic...

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