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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

#51

Post by brcmthrowaway »

Const-me wrote: post #35
brcmthrowaway wrote: post #25

Earlier quoted context omitted.

Could you wire them in parallel for more watts

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.

Re: I tried making artificial sunlight at home

#52

Post by drewolbrich »

alejohausner wrote: post #41

For me, the problem with this setup (and with most high efficiency LED lights) is the lack of red wavelenghts. Real sunlight has a substantial amount of energy in the very red end of the visible spectrum (700 nm) and also of course quite a bit in the infrared. These lamps have two spectral peaks: a narrow peak in the blue range, around 450 nm, a broader peak in the green, centered around 580 nm. That greenish peak fa…

My issue with this setup is that it doesn't emit as many neutrinos as the Sun.

Re: I tried making artificial sunlight at home

#54

Post by 14 »

Very cool. I do think the DIY perks version just pops a little nicer but it could also be the photography of the project. But the firm factor if your project is much nicer as well. I think both projects would be better suited for different needs so again very cool. If you had lots of space the diy perks would be the way to go. If you only have a thin wall or ceiling then yours would be best. All in all thanks for posting this.

Re: I tried making artificial sunlight at home

#55

Post by jclarkcom »

dan-robertson wrote: post #47
sheepscreek wrote: post #34

Earlier quoted context omitted.

“Virtual Sun” looks really cool. How much does one cost today? Say if someone wanted to buy a single piece or a few (2-3).

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/products/circadian-sky/CircadianS...

Re: I tried making artificial sunlight at home

#56

Post by ketralnis »

drewolbrich wrote: post #52
alejohausner wrote: post #41

For me, the problem with this setup (and with most high efficiency LED lights) is the lack of red wavelenghts. Real sunlight has a substantial amount of energy in the very red end of the visible spectrum (700 nm) and also of course quite a bit in the infrared. These lamps have two spectral peaks: a narrow peak in the blue range, around 450 nm, a broader peak in the green, centered around 580 nm. That greenish peak fa…

My issue with this setup is that it doesn't emit as many neutrinos as the Sun.

Have you considered taking neutrino supplements?

The nice thing about them is that they're flavour changing

Re: I tried making artificial sunlight at home

#57

Post by [deleted] »

drewolbrich wrote: post #52
alejohausner wrote: post #41

For me, the problem with this setup (and with most high efficiency LED lights) is the lack of red wavelenghts. Real sunlight has a substantial amount of energy in the very red end of the visible spectrum (700 nm) and also of course quite a bit in the infrared. These lamps have two spectral peaks: a narrow peak in the blue range, around 450 nm, a broader peak in the green, centered around 580 nm. That greenish peak fa…

My issue with this setup is that it doesn't emit as many neutrinos as the Sun.

[deleted]

Re: I tried making artificial sunlight at home

#58

Post by fouronnes3 »

vincekerrazzi wrote: post #48

Honestly this area is so interesting to me because of how incredibly strongly light (or lack thereof) affects in the winter. It also seems to affect me more strongly than most in regards to sleeping patterns. Too much blue light in the evening and bam, brain refuses to sleep until 2am or later. So for me the biggest factor missing in these kinds of projects is a dynamic color temperature. While we get that from produ…

This is the reason I decided to use 4000K instead of the more physically accurate 5400K. I picked a less middle of the day color temperature and closer to evening time, basically.

I spent a lot of time looking at LED suppliers and there's quite a range of options in terms of color temperature. Some manufacturers even have 2 color temps on the same LED package, meaning you can sort of do what you describe by mixing two light sources at a distance less than a millimeter.

> Honestly I want to build something like this but my area of expertise is too far into the software domain, and not very far into the hardware or electrical engineering domain.

That was me last year before starting this project! You'd be surprised what you can achieve with time and effort!

Re: I tried making artificial sunlight at home

#60

Post by ankitml »

alejohausner wrote: post #41

For me, the problem with this setup (and with most high efficiency LED lights) is the lack of red wavelenghts. Real sunlight has a substantial amount of energy in the very red end of the visible spectrum (700 nm) and also of course quite a bit in the infrared. These lamps have two spectral peaks: a narrow peak in the blue range, around 450 nm, a broader peak in the green, centered around 580 nm. That greenish peak fa…

Yep, that was my first assessment. Cant call it sun without NIR.
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