The closest previous 5mm led from rngwn was a 5800K one, a short test elsewhere in this thread: link. I’d say it is about equally good, output slightly less, colour rendering slightly better. But I like the narrower beam of this new 5000K led a lot, makes a very useful beam that is a bit brighter.
Here are the two leds together plugged in parallel into the same power supply, 60mA among them. That tells that the voltage can not be much different as the outputs a similar ( but I think the 5000K voltage is a bit higher so that it receives a bit less than half of the current) :
The tints in the picture came out rather close to reality (on the screen of my Sony phone at least).
But hey, the good thing is that 3xAAA lights are wide enough for 21700 cells.
With some wizardry it is often quite possible to get all 70 millimeters in there too.
But sub C NiMH cells now have become interesting too.
Gives you enough space for a boost driver (which you’ll need).
Well, after the recent bunch of lost mails so it’s time for to set up a ground rules of how much I can comfortably compensate for the loss. I have modified the shipping table so it includes the information on how the compensation will be made should the package is lost. The rule will be in effect from today onwards (Jan 21, 2020).
This does not apply to those who paid before that, which they are in for 1 additional shipping attempt if I know convincingly that the package is lost.
Came here to confirm receipt of my latest LEDs and…
…
Ooh, 5000K LEDs! Paypal sent
I warmly recommend buying from rngwn, he packs his stuff well and ships it quickly. Both of my packages came from Thailand to Scotland in 10 days flat, with all LEDs in perfect condition.
Thanks very much for making these rare LEDs available to us, rngwn
Just checking in to say I received my shipment on Jan 31, About 10 days to reach California.
My first time trying the 2300K, I am so glad I finally ordered these!!! Perfect extra warm color temp for candelabra, night lights, etc. and preserving your melatonin levels at night.
As per postal service’s announcement regarding Coronavirus, I will only be able to ship to Mongolia (if somebody happens to live there) using Express service until further notice.
I promised rngwn several weeks ago I would do a destructive test on some of these LED’s. I’ve been very delayed due to life being busy. However, I did this week finally have time to load ceilingbounce on my wife’s old smartphone and do one test on a 2300K sample.
It ran at 150mA for several hours before I had to stop the test because I couldn’t monitor my sketchy setup any more for safety’s sake. When I let it cool down and restart, it was still nearly as bright as at the start of the test. I was surprised it survived longer than 30 minutes!
I think the test is unrealistic, however, because at only 1/2W, even the legs provide significant air cooling. To better replicate a flashlight, I plan to repeat the test with the legs trimmed short, and the LED facing vertically so convection is more limited. Depending whether it dies quickly 150mA, or shows no signs of dying in a reasonable test duration, I will repeat it on another sample at higher or lower current.
Hopefully I will have results this weekend. These are really nice low power LED’s for tinkering with, so I think it is good for the community to have reasonably accurate information about how far they can be pushed.