Ultimate LED Bulbs - Ultra High CRI - The Honorable Quest

CE from qihan not so good. Low power have no models with voltage and current what I need, 20w CE flashing more than 20% because they have PF: 1

I added supressor and reusable fuse and thermistor. Its enough.

About CCTs.

The most popular is 4000k, I also use it. Another is 5000k (2-3 times lower) and 3000k (2-3 times lower than 5k)

it is completely upgraded v 1.3 and 1.4



it was v.1.2 upgrade


Sorry, I will answer here. I will not create topics yet. Now loaded with work and household chores.

I found the 2800K version of this from a Finnish online store and will report back when I get it. The manufacturer told me that this bulb is about to be discontinued though and I couldn’t find the 4000K version for sale anymore.

Heavily modified Qihan drivers I guess.

Supressor? Fuse? Thermistor?

I added input capacitance to a bunch of Qihan units I had lying around after reading a report of high mains output ripple by some fellow from Mordor or thereabouts, :-)) too. This is a QH-40W-LP with 3 × 15µF (cheap) capacitors:

Let me also share a photo of a 20W “Dark Energy” driver I bought from eBay, which came with good input capacitance:

The above unit had no components on the underside. And I couldn't find sense resistors above either, my guess is they are under the transformer.

It is good 20w led driver. I used it 4-5 years ago in lamps for plants. 25P model. But 600mA disappeared from sale. After that I moved to 20w led driver from Qihan =>22P

About ripple.
There is 2 types of led drivers from Qihan. 1st have no ripple (pulse) in out. This type only 5-20W
2nd is led drivers with good power factor (~0.97). There is only one way do do it not ripple - add capacitors in out.

more photos and results

I tryed to add big capacitors 400v - it was some fatal errors.

The good news, that 80 and 100w models strobe only on 7% (100w 35v)
I mean this

more photos and results

But I also upgrade it to this (old version of upgrade - 1.2)

Where are you guys finding these very handy looking Qihan drivers? eBay and AliExpress didn’t return results that look right.

shop on taobao

No actually I don’t prefer violet spectrum for my needs as I’ve tried a few. I’m only looking for some to replace my current household lightbulbs for nighttime use. I prefer 2700K with a negative duv or below the Black Body Locus tint. I’ve tested many bulbs in the past and only the GE Reveal offers this combo but they keep burning out. Their reliability is the worst I’ve ever seen.

They're easy to find, at least for me, with a proper search on eBay. I'll make it easy for you, check this (300mA,350mA,600mA,650mA,900mA,1500mA) led driver custom search, you'll find plenty.

Wow that is some massive output capacitance! Am I seeing the driver came with 8.8mF (4 × 2.2mF), and you added 3 × 6.8mF = 20.4mF to fix the ripple? LoL!

What's wrong with adding high voltage input capacitors, the power factor goes down?

What he means by Duv is “Delta uv”, or the distance the CIE coordinates are from the Black Body Locus. You likely have never been asked that before, but on BLF it’s a huge deal to many users. Above the BBL is a greenish tint, that disgusts some people. And below the BBL is a reddish “Rosy” tint.
For me, a “rosy” Duv isn’t any better or worse than a “greenish” Duv. But some people need rosy.

Not fix! But do it lower

Just try, and will say what happened :smiley:

If everything was so simple, think I would become so bother?

Yes, they didn’t ask. I do not know what to answer …

I think you did, it’s in your reports:

And here it is plotted in “ColorCalculator v7.73”

This is about as green as the sun. But from other threads I know some members consider that unbearably green.
Heck, another member mentioned about a month ago they were trying to get the BBL standard lowered because they thought they had research supporting their claim the BBL itself was greenish. But that research seemed to be using “Fake White” RGB lighting.

I bought for test leds from SOLs manufacturer. Without violet. It is vita white and original white series.


SOLs




I hardly doubt it is a galvanic isolated driver (propably some kind of flyback topology) so in this circuit this inductive component works more like coil/inductor not transformer.

No, I can not wait! I just send this lamp today. World must know this thing (190g weight)
2700/3200/5000/5600/2700+3200/5000+5600/2700+5000/2700+5600
/3200+5000/3200+5600/2700+3200+5000/2700+3200+5600
/5000+5600+2700/5000+5600+3200/2700+3200+5000+5600k
SunLike10xss









It can be my last lamp. I am going to escape from the MORDOR. I just get passports.

Wow, that’s a lot of switches. It’s going to need a user manual :smiley:

Adam, you are spoiling the surprise!

PS: I understood you were Russian and presented your shop as such. Sorry for that, my bad.

center 2pcs:
in one way - cold
in another way - warm
in any different ways - neutral (cold + warm)

left 2pcs:
in one way - cold
in another way - very cold
in any different ways - not so cold (cold + very cold)

right 2pcs:
in one way - warm
in another way - very warm
in any different ways - not so warm (warm + very warm)

doy understand me? do you? :smiley:

I know. But I think that not for all. Not so much people read this topic.

No, not Russia. Nein! Nein! Nein!

Belarus, Ukraine. Rus language was in all CCCP countries.

Aaah! Ukraine. Here is some crazy fellows from Ukraine too:

Source thread: Testing 18650 Safety - Russian Ukrainian Style

:-D