SunLike LED inside the home, studio, streetlights...

[Tin Can]

Not on market yet, but soon.

http://www.seoulsemicon.com/en/product/SunLike/

Look at the spectrum in the datasheets.


97 cri 5000K

[Drew Wiley]

Interesting. Let's see if anyone actually markets it. Several companies have cried Wolf before.

[Gary Beasley]

Ive been putting 5000k leds in my home as quick as they were available. I started in my workshop replacing all the t-12 fluorescents with hyperikon led tubes. Screw in 5000k bulbs are making it to the shelves now and I notice the output looks brighter for the same lumen value compared to the soft white type.
These new lights should be even better if they become the new standard. They should be great for grow lights as well.

[Drew Wiley]

Those things you're describing, Gary, aren't even remotely the same thing. They're tweaked blue light and terribly hard on the eyes. I can't even be in the same room. Compare the two spectrums on that link. But nothing like this is likely to hit mass retailers. Think maybe fifty bucks a bulb - true architectural lighting.

[Gary Beasley]

That price is high, but it was pretty high on the first equivalent led tubes too. It will come down, just have to hope it will be soon. Im thinking these would be perfect for the inspection booths in the print industry, full spectrum light is necessary for accurate color evaluation.

[Drew Wiley]

Maybe, maybe not for awhile. They might not even be interested in the consumer market. Gotta recoup R&D expenses before licensing the patent to some outfit that could ruin their reputation in a fortnight due to lack of quality control or misleading labeling - which seems to be the mantra of chain stores. Or this could just be a trial balloon to attract investors, who could make it either sink or swim. I hope it swims!

[Drew Wiley]

Gary, I been using 98CRI 5000k tubes for the last 30 years. The came from Germany and cost a bundle, but have also been exceptionally reliable. Not one has burned out yet (old hold-down starters, not quickie ballasts). I installed them not only in critical applications in my lab, but at color matching stations at my ole workplace.

[Tin Can]

I installed a dozen of these 35 years ago in my last wife's painting studio. She wanted to paint at night in daylight. I sprayed the entire space in matte eggshell white. I also worked at night.

https://www.buylightfixtures.com/ge-chroma75-fluorescent-light-bulbs.aspx

On a snowy night, the windows glowed like a spaceship.

She painted Rembrandt style using traditional methods. Modern sitters.

RIP Marnie.

[Bruce Watson]

Not on market yet, but soon.

http://www.seoulsemicon.com/en/product/SunLike/

This is what I've been waiting for from Cree. But they have not quite delivered. Better than fluorescents, better quality of light at more or less half the power. And no mercury. What's not to like?

[jp]

That would be nice!

It's a cheap form of electronics gadgetry, but I love lights and try any new kinds that come to the hardware stores, shop amazon for them, etc...

I think for most purposes, well chosen LED light is good enough to start installing rather than previous FL or LED alternatives or holding off. Costs will come down some, but probably reliability as well.

Right now, I'm using 90+ CRI led hyperikon tubes for my retail area.
https://smile.amazon.com/gp/product/B01H4KU634/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Better than fluorescent, better than most screw in bulbs. Photos shot with cell phone look great, as that seems to be the type of camera most finicky about poor CRI lighting and least able to compensate with awb. The transition from North window natural light to LED light is very smooth and doesn't make for bad photos.

[Tin Can]

Yes, they will be nice to use.

But I really want is nanobionic light-emitting plants. Not a joke, found on the last page of Photonics Spectra February 2018. I subscribe to this fascinating magazine.

MIT says plants may be desk lamps and street lights.

https://www.photonics.com/Article.aspx?AID=63052&PID=5&VID=149&IID=986

[Tin Can]

That would be nice!

It's a cheap form of electronics gadgetry, but I love lights and try any new kinds that come to the hardware stores, shop amazon for them, etc...

I think for most purposes, well chosen LED light is good enough to start installing rather than previous FL or LED alternatives or holding off. Costs will come down some, but probably reliability as well.

Right now, I'm using 90+ CRI led hyperikon tubes for my retail area.
https://smile.amazon.com/gp/product/B01H4KU634/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Better than fluorescent, better than most screw in bulbs. Photos shot with cell phone look great, as that seems to be the type of camera most finicky about poor CRI lighting and least able to compensate with awb. The transition from North window natural light to LED light is very smooth and doesn't make for bad photos.

I also... I love buying and using light bulbs. I have too many, i gave away all my CFL. Not liking those one bit.

I installed a dozen of these. https://www.amazon.com/gp/product/B01HBT3BVM/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

One went blinky, documented elsewhere on this forum, but I have a spare case.

I like a very white light in my workshop. Reminds me of my wife's old studio.

[Gary Beasley]

Gary, I been using 98CRI 5000k tubes for the last 30 years. The came from Germany and cost a bundle, but have also been exceptionally reliable. Not one has burned out yet (old hold-down starters, not quickie ballasts). I installed them not only in critical applications in my lab, but at color matching stations at my ole workplace.
One thing I like about the Hyperikon units is you can run them without the ballast and get even more savings on the electric bill. Putting them in my shop I got twice the light using half the electricity as the flourescents. I like the 5000k color too, looks more natural.

[Drew Wiley]

When low-E lighting was mandated, it stuns me that the health risks were not weighed first. There's an epidemic of middle age cataracts (vs old age) due to computer screens and E-lighting. CFL's are an interim technology, and most of em are utterly junky, and burn out just as fast as cheapo ordinary light bulbs did. There are still ways to bootleg tungsten bulbs like using heavier droplight bulbs. The stupidest thing is them allowing hot halogen bulbs but not ordinary tungsten. A lot of houses have burned down and lives have been lost to that idiocy, esp combined with Cheapo Depot floor lamps that fall apart if an aphid lands on em. I had to wear sunglasses in my office until traditional chroma tubes showed up. The owner had doctor's orders to remove the low-E ones. He almost went blind. I pity these kids who grow up with electronics screens instead of puppies n kittens.

[Tin Can]

I buy http://lightbulb.aerolights.com/viewitems/aero-tech-bulbs-made-in-the-usa-20-000-hours/-a-series-light-bulbs-rough-service-20-000-hours

Very nice bulbs. Menards stocks them.

Made in USA

[Drew Wiley]

There's a bulb at a small rural fire house in this area that's been continuously burning for 115 yrs. They knew the importance of heavy filaments and thick bulbs way back then. But of course, the mfg soon went bankrupt due to lack of repeat sales.

[Peter De Smidt]

This looks similar to Yuli's technology: https://store.yujiintl.com/ .

[jp]

I buy http://lightbulb.aerolights.com/viewitems/aero-tech-bulbs-made-in-the-usa-20-000-hours/-a-series-light-bulbs-rough-service-20-000-hours

Very nice bulbs. Menards stocks them.

Made in USA

Ooohhh! very nice also. I could use these for the small obstruction lights on my tower. Real brass base and long life. Changing light bulbs can be a $1000+ job, rugged lights are a must.

[Tin Can]

This looks similar to Yuli's technology: https://store.yujiintl.com/ .

It does, Yuli is Chinese and SunLike is Korean. Yuli samples are available now.

Spectrum graphs look different, but both stress violet/purple is key.

[bob carnie]

On a tangent - does anyone think these types of lights could be strong enough to make Pt Pd or Gum which require high intensity, high UV wavelength light.??

[Tin Can]

On a tangent - does anyone think these types of lights could be strong enough to make Pt Pd or Gum which require high intensity, high UV wavelength light.??

Somebody has to try it. Look at the Spectrum on page 5 here. http://www.seoulsemicon.com/upload2/Pre_Specification_SAWS1566A_Rev0.2.pdf

Might be a good thing to have a UV meter...at least until you know what it the light does.

The PDF is for PAR, MR16, the street lights I have seen have 20 or more in one panel. Diffusion may be an issue.

[Peter De Smidt]

I believe Sandy has experimented with UV Leds. High CRI emitters wouldn't seem to be required for that purpose.

[Tin Can]

I believe Sandy has experimented with UV Leds. High CRI emitters wouldn't seem to be required for that purpose.

Peter, you don't think the improved UV saturation from 400 to 450 nm would be advantageous? Perhaps shorter exposure times? IDK

There is a sharp cutoff below 400 nm and i think Alt users want down to 350 nm, which current BLB fluorescents supply easily. https://www.atlantalightbulbs.com/light-bulbs/fluorescent-lamps-linear/fluorescent-specialty-black-light-350nm/f20t12bl/ This one is listed as good for chemical processing...

[Drew Wiley]

Oh heck no. Maybe, remotely possible for a conventional colorhead someday if a far higher wattage version ever exists. There are plenty of high-UV bulbs out there already. Gotta be careful with em though.

[Drew Wiley]

For small prints you can even use a conventional sunlamp; but be careful with skin and eyes! Used contact printing lights were once abundant in pre-press equipment houses, probably still are. Look under Printing in the Industrial section of EBay rather than photographic stuff.

[bob carnie]

Oh heck no. Maybe, remotely possible for a conventional colorhead someday if a far higher wattage version ever exists. There are plenty of high-UV bulbs out there already. Gotta be careful with em though.

Please show me a source Drew for these Bulbs

[Gary Beasley]

The Hyperikon brand offers 6000k in certain types, though I couldnt find and spectrum charts on them. I wonder if that would make any difference in the alt processes.

[Drew Wiley]

Look under scientific applications, Bob. There was an entire walk-in store in downtown SF dedicated to UV, recently forced out of business by the usual suspects - skyrocketing rent, internet competition, and retirement plans. UV is used a lot in tech industries. You'd have be more specific about your needs, and perhaps I could help with the search. There are bulbs out there that need water-cooling jackets, and it was only about a year ago that some actual UV LF enlargers went to landfill in perfectly operable condition because someone wouldn't budge an inch on asking price. I've got all kinds of special UV-tolerant gasketing, tapes, and sealants in my own shop from local tech or aerospace supply houses.

[Willie]

Downside to a lot of the newer LED's and fluorescents is the lack of heat they produce. Can't lay one on the car battery overnight in a drop cord mechanics light to keep the battery warm. Or put the drop cord light down the covered well, tied off so it can't hit the water, to keep the surface and pipe from freezing.
Some of the newer lights don't want to come on in sub zero temperatures (0-40 below) which makes them unusable a night for about half the year where we are.

The "full spectrum" LED lights do look nice. Clean light that makes food and interiors look good.

Just need to figure out how do small lights to replace the fluorescent type head in the 5x7 Beseler enlarger.

[Drew Wiley]

Still there,Bob? There are eight pages on EBay for NuArc bulbs alone; and their sources no doubt have a lot of other stuff. There's a huge new bulb only store just over a mile down the street from me. I should stop in there some day. Plenty of high-tech R&D going on around here.

[andrewch59]

A question for those with a greater knowledge of lighting than myself, which should prove to be most of you, has anyone ever tried the black compact fluorescent bulbs to reproduce an adequate light source for alternative printing techniques??

[Drew Wiley]

It's been done many times.

[Tin Can]

Not a good example, but Youtube often has more info than we share.

Here's A DIY

https://youtu.be/emFCCGlzjnQ

[andrewch59]

Thanks Randy, they are more like the ones used in the softboxes, but I have never seen them used in a uv exposure box. Thought perhaps somebody may have experimented with them
175164

[Drew Wiley]

Normally used as a bank of tubes, not screw-in bulbs.

[chris_4622]

Not on market yet, but soon.

http://www.seoulsemicon.com/en/product/SunLike/

Look at the spectrum in the datasheets.


97 cri 5000K
Randy,
Yuji is using violet in their VTC series, scroll to the bottom to see where it is mentioned. I don't have enough knowledge to know if we are comparing apples with apples.
https://www.yujiintl.com/high-cri-led-lighting

[ledstadium]

Thank contact as soon as possible.

[randy_m]

Randy,
Yuji is using violet in their VTC series, scroll to the bottom to see where it is mentioned. I don't have enough knowledge to know if we are comparing apples with apples.
https://www.yujiintl.com/high-cri-led-lighting

Hi, lurker here also interested in "sun-like" LEDs. Came across Waveform Lighting (https://www.waveformlighting.com/high-cri-led) - looks like they also have "violet" in their LEDs - anyone tried their products?

[Andy Eads]

Gary, I been using 98CRI 5000k tubes for the last 30 years. The came from Germany and cost a bundle, but have also been exceptionally reliable. Not one has burned out yet (old hold-down starters, not quickie ballasts). I installed them not only in critical applications in my lab, but at color matching stations at my ole workplace.

Drew, I ran a small printing business catering to graphic artists and their clients. I installed the highest CRI lights as close to daylight color temp as I could get. In a very short time, they paid for themselves. An unexpected benefit was that my employees said they felt better and less fatigued by the end of the day. I would be cautious to see the CRI and spectral output of any LED before installing it for a critical application...or even my home for that matter. - Andy

[Drew Wiley]

Yes, lighting affects mood, and our physiology is geared to real sunlight. I'm skeptical about LED's having "arrived" yet... Pasco? My uncle had a ranch near there. But he was overseas as a Peace Corps engineer most of the time in third world countries, but returned in his 90's to work the ranch and got a sunstroke - stubborn fellow; but that's what it takes to get officially inducted into Explorers Club like he was. When I was young my Dad took me out of school every Fall for long geology drives throughout the Northwest, which included that area. But I need my truck AC replaced before taking any drives up that way again.