Received the package of 100.
There will not be a proper review until next tuesday (I will have enough forum chat time but there will be no hands-on cave time possible).
Quick first impression of one random led from the package:
*plenty bright
*very pleasant tint to look at
*very smooth broad beam (60 degrees from specs seem correct)
*edge of the beam a bit warmer than the rest (found it not disturbing)
*at ~20mA, middle of hotspot: 3325K, duv ā0.0039, CRI=97.4, R9=88.
Many will be waiting for the review djozz. Thanks.
Any 7x emitter honeycomb arrangement host or flashlight out there for these? Hexagonal/honeycomb is the most dense arrangement, I wonder why it doesn't seems to be widely used.
My first LED swap which didnāt require solder. In fact I only used a screwdriver, wire cutters, and tweezers:
I recently ordered some batteries from Shockliās aliexpress store and they threw in some freebies with my order. One was this cheapo keychain light. It has a 5mm straw hat LED that is press to activate and has a tiny switch to ālockā it on.
I bent and trimmed the legs of my Yuji 95 CRI 3200K LED
We have light!
I just now am realizing it had 2 stacked CR2016 batteries so I am probably giving this thing way too much voltage? Maybe a 2032 battery would have been more appropriate, who knows. I guess if it dies iām out 55 centsā¦
That and the fact that you donāt turn that on for a sustained period. Even if you overdrive these LEDs and degrade them way faster than their rated lifespan, you probably wonāt notice it.
CR2016 cells are indeed 3V. The āCRā code denotes a lithium manganese dioxide chemistry, nominally 3V.
Alkaline button cells are 1.5V and are given āLRā code. The typical form factor is also fatter and taller than lithium coin cells.
A pair of CR2016 cells shouldnāt be any concern, but because of the low forward voltage on the Yujiās, they run pretty well on a single CR2032 cell, in my experience.
I havenāt done a controlled test, but Iād expect you would get more stable output and significantly longer runtime out of a single CR2032 compared to a pair of CR2016ās, although you might get higher initial output out of the latter. The massive voltage drop the pair of smaller batteries experience is in part due to a lot of energy being wasted on internal resistance.
Either cell does better at these kinds of loads with intermittent use (a few minutes at a time) than continuous use. Itās surprising how much the voltage recovers when a load was removed in a test HKJ did:
:+1:
