The Jetbeam-II also has its driver glued but there’s a very thin brass washer. If rubbed-off copper is actually the problem, I’d see if I can find such a washer or a sheet of brass foil to make one.
There is a whole complicated situation when it comes to Chinese manufacturers of flashlights. This is why you see clones and more than one version of the same light. Hank has his company and he decided to use two brand names to distinguish two different lines of lights. Emisar and Noctigon. He did the Noctigon Meteor several years ago (2016 I think), but all his lights since then were the Emisar brand. So folks tend to associate all his lights as Emisar and he just recently decided to release the K1 under the Noctigon brand. People know it’s from the “guy that does the Emisars” and it has the same user interface as the Emisars so you can see how people might confuse it with an Emisar.
"... .... .... He did the Noctigon Meteor several years ago (2016 I think) ... ... ..."
Noctigon Meteor M43 was late Winter 2015, as far as I can narrow it down. My hopefully not so stupid question: Can I get mine modded (again) from XP-L to W2 emitters?
I am checking out Nichia 219B SW45K R9080. The setup is Noctigon 3UP MCPCB with Carclo 10507. My battery charger can be used as the power supply, so it is the source of the power. It does not have PWM. I am doing this just to see how it is before putting it into the light.
Is there like burn-in or break-in periods for the new LED?
On the first time ever power up, I saw huge amount of pink, as noted everywhere for this LED. I thought it could have been little bit too pink. However, I played with it for a while. It settled into very nice white with less pink.
I am thinking I just got used to the new tint because this is my first time seeing SW45K in person. But, my experiences with E21A 4500K with R9080 and 219B 4500K R9050 do not show something like of burn-in or break-in.
I only used 3.0A (1.0A each). All three of them appeared to show the same brightness. The MCPCB was mounted on the heatsink. I don’t think the LED’s are burning up literally, not the tint turning into violet.
Have you experienced anything like this? I still think it is my imagination.
Color perception is very relative. The same LEDs will look completely different when the background light is noon sunlight vs incandescent lightbulbs for instance.
News Release 28-Jun-2020
Declining eyesight improved by looking at deep red light 650 to 1000nm
Peer-reviewed | experimental study | people
University College London
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Does anyone have a source for a far red LED light? around 650 to 1000nm ; this research used 670nm
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Samsung produces some 3535 deep red LEDs in 660nm and 730nm.
May be pretty difficult to drive the 730nm with a standard LED driver as the forward voltage is very low.
Hank, since there is a “grandma light” being developed, maybe you could start an “over the hill light” for all the old and blind folks.
Helen Keller:
The only thing worse than being blind is having sight but no vision.
Hmmm, the necessary must be out there somewhere.
Good point about finding the appropriate driver — thank you.
Here’s a very pricey far red “healing” light
This source sells 660nm LEDs 1.06€ 6% OFF|10 100 stücke 1 watt 3 watt Warm/Weiß/blau/Royal Blau rot/grün/ gelb/660nm UV Violet RGB High Power LED Chip Licht mit PCB oder nicht pcb|Leuchtperlen| - AliExpress*
Ah, here’s one on a board:
3.07€ 10% OFF|1w 3 w660nm Hochleistungs LED Chip Voll spektrum Wachstum Royal Deep Red 2,4 2,8 v 500 700ma DIY|Leuchtperlen| - AliExpress*
And a fully assembled flashlight:
Seaconch Red Therapy Light 9W Infrared Lamp Maximum Irradiance 660 Nm Led Pain 630nm 5 Minute Timer Red Light Therapy
US $62.90
Ah, Luxeon’s on it:
Now, to find a driver ….
hmmmm —- red 670nm laser, pretty cheap
http://www.aixiz.com/store/product_info.php/products_id/312
670nm 5mW laser module 3VDC adj. lens 670 nm $6.50
Apparently has a driver. Or else is running on straight 3V, a couple of batteries?
Not tht I’d want to point this straight into my eyeballs, of course. Maybe diffused or reflector-bounced off a white board ….
Thank you Scallywag, now i don’t feel so dumb anymore :+1:
I read up on the FT03. Pretty sweet thrower, It’s made by Bangwood, and I think it was a year ago when I promised myself to stay away from them. Still waiting for my package.
Would it be a dumb thing to pass on it and find a different thrower somewhere else?
There are other stores selling the FT03, like on Aliexpress for $50 ish, but you don’t get the good coupon code.
You can also find the same light as a Mateminco MT35 on Aliexpress. It’s about $40 ish depending on the bezel you want. That’s probably your best bet.
Then you don’t have to deal with Banggood, but you still take risks from using a store your not familiar with.
I dont know your situation from Banggood, but if the shipping takes a few months, ask for a refund. Sometimes packages get lost, then later found and get delivered. It sucks, but at some point in time, like 3 months, it needs to be declared lost and you refunded. Of course businesses do not like giving refunds and Banggood will hassle you a bit (some people get discouraged and give up which means the store saves money), but you just stick with it and demand a refund.
I wouldn’t even do that. If your diffuser burns through – or the intensity of the laser just degrades it to be a bit less diffuse – then you end up lasering your retina.
Even the reflector idea is iffy. All it takes is an accidental mis-point reflecting off something shiny.
To be honest, I’m really looking askance at this whole idea of deliberately shining DIY lights of any kind into your eyes. I’d leave that sort of idea to medical device designers if I were you.
I understand why people enjoy warm emitters with a high CRI, but what application does a 6500K light have? Lets say a D4V2 - what would be the motivation to get a 6000K-6500K emitter version?
People that think single percentage point increases in output are noticeable and/or mistake eye strain as being “brighter”.
A lot of folks associate warm or neutral color leds for being crappy, old, incandescent looking. While the cool white colors are modern, fresh leds. It’s why cars come in different colors. People have different preferences. On top of that, not everyone sees the same. Color perception varies from person to person.
To annoy people, and to attract bugs.
I am loving my https://www.reylight.net/product/reylight-pineapple-copper-limited-edition/ with 4000K Nichia 219C high CRI.
Are all 4000k 219C made the same or is there a tint lottery?
If I want to try something warmer along the same lines, would the 3500k E21A be a good choice or are there others I should look at?