| ▲ | mjmas 6 hours ago |
| Someone please tell the Australian government now that we've essentially banned other forms of lighting. (except fluorescent) |
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| ▲ | u1hcw9nx 5 hours ago | parent | next [-] |
| You can buy full spectrum LED lights (99 CRI, or grow lamps) The article uses LED as synonym for typical LED lightning. |
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| ▲ | ale42 5 hours ago | parent [-] | | How is "full spectrum" defined in this case? Visible spectrum is not the subject of the paper, as they care about infrared. | | |
| ▲ | krackers 5 hours ago | parent [-] | | Also even limited to visible spectrum, I have not seen any 99 CRI bulbs. The highest one I have ever found are the 98 CRI by YujiLED, but you pay around $35 for a single bulb. It is absolutely not "easy" to get flicker-free high CRI bulbs, let alone ones that cover the infrared range. | | |
| ▲ | KennyBlanken 3 hours ago | parent [-] | | Phillips, GE, Cree, and others sell high-CRI bulbs. 10 years ago you had to work to find high CRI bulbs but could still find Cree bulbs pretty easily. Now you can get high CRI bulbs at the grocery store. High CRI bulbs generally have low or no flicker because high CRI is toward the premium end of the market. IR emission is not a "feature", it's a bug. | | |
| ▲ | krackers an hour ago | parent [-] | | Almost all of the bulbs you can find at a hardware store (let alone grocery store) exhibit terrible 120hz flicker. I know because I've literally tried every single one. Also it's not hard to get "high" (~90-94) CRI while nonetheless having terrible deep reds. Out of the manufacturers you listed, only Philips Ultra Definition (95 CRI, R9 90) have low flicker and good R9. Unfortunately they are poorly made and I have to keep buying new packs each year but it's more cost effective than Yuji for lesser used areas. Also the claim from TFA is that NIR component improves visual performance (and I've read elsewhere that NIR also has health benefits). |
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| ▲ | novok 5 hours ago | parent | prev | next [-] |
| You can't buy heat lamps? They are even more infrared and last longer. Also LED lighting can have infrared, have a significantly more smoother spectrum curve and still last +20k hours without burnout. The cheaper bulb spectra that they show is a blue led + phosphor coating, but there are infrared LEDs, UV leds, and more. You can make quite the convincing sun simulation, even better than any incandescent bulb, but there is almost no demand for UV + Infrared super full spectrum lighting unfortunately. Only movie & theater lights come close. |
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| ▲ | krackers 5 hours ago | parent [-] | | >LED lighting can have infrared, have a significantly more smoother spectrum curve and still last +20k hours without burnout Do you have a link to a bulb that you can purchase meeting all these criteria? The only one I'm aware of was this obscure "StarLike" that was never actually sold in bulk. LEDs can be made good in theory sure, but in practice they are all terrible in light quality compared to a standard incandescent. https://budgetlightforum.com/t/sunlike-vs-starlike/64155/7 | | |
| ▲ | novok 4 hours ago | parent [-] | | You would need to see the spectra of the various LEDs available and create a mix along with phosphor mixes. The closest thing is something like a BLAIR-CG light engine from aputure where they have something like 9 different colors of LEDs that mix together, but they don't put any infrared leds in them because they are for movies and they don't put any UVB or proper UVA leds. But there are infrared, UVA & UVB LEDs that you could apply the same kind of engineering principle to make something that closely follows the sun spectra. No, you can't buy them as bulbs. The closest thing is those red light therapy panels that include them. | | |
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| ▲ | dangus 5 hours ago | parent | prev [-] |
| Typical electricity rates in Australia are up to 40c/kWh or so. Do you really think $5 AUD per month per bulb that you’re running 8 hours a day is worth it for better spectrum quality? |
