Ultimate LED Bulbs - Ultra High CRI - The Honorable Quest

Other Types of Lights LED Light Bulbs
11

I see one possibility here : European GB FTW!

Their references are somewhat confusing. I see at list 3 product ranges, but exploded in multiple variants (that is normally great but it's a bit difficult to get a hang off and navigate in, as some specs seem "on point" close (or undisclosed?)) :

For instance you tested 4007.27, 4007.40 & 4007.50 but 4007.xx bulbs are not supposed to exist on their current website.

Or the 4003.65 is listed two times on their website, one marketed for jewelry rendition, the other "full spectrum". The 4005.65 for Birds or not, etc. One 4005.50 is D50 calibrated, the other does not?

Otherwise, would you be interested to test those if I were to send one to you? They are claiming CRI 98 / R9 93 / R12 90 (see graph) and that is all great but I don't find independant test. And this seller shop, (which history all check-out and trace back some 17 years ago (via H2i Technology)) could be linked to a strange marketplace platform. It could all be legit, but as always : caveat emptors prevails.

12

I have the Philips GU10 ExpertColor all over my house now, in 2700K and 3000K, they have a perfect smooth beam and are over 95CRI and slightly below the BBL. I can not foresee needing anything better apart from hoping that a similar light quality can be had for the same price (I payed about 7 euro per bulb) in unidirectional bulbs.

13

Any idea if the 4000K ExpertColor is as good?

14

Sure, I’ll gladly test one.

15

I have no idea. I dared to try a Yuji 4000K remote phosfor bulb once in the house, and my girlfriend felt like she was in hospital instead of at home. So apparantly 4000K is not for us.

16

Did you also had the opportunity to test some Yuji's?

17

I never checked that bulb actually because I have had it long before I got my spectrometer. I could if you are interested.

18

In one, simple but effective, word : YES

In two, honest and heartwarming, words : YES, PLEASE

Which of Yuji's reference have you got on hand?

19

It must be YJ-BC-RP-6-40, it is a couple of years old already but it looks like that one.

20

Surfing Hyperikon's website I have found a better promising bulb, in the name of the "Hyperikon 212000401" an A21 17W 120v (sic) solution, still ranging from 2700 to 5000K and advertised at CRI 92.

However, searching detailled data/tests on it, the 4000K version seems to be tested at "17" for R9 (source, indiecinemaacademy)... Meeh ? And EnergyStar tests on the supposedly same (if HyperA2190-40, A21-40, and 212000401 are the same) 4000K version R9 at 63...While the 5000K should be at R9 90 and CRI 95.

Oh, well.

EDIT : browsing indiecinemaacademy pages, have found the Quasar Science S-LED bulbs (95+CRI). Unfortunately, I can't find detailled info or other tests yet. And well, 120v again.

21

Hyperikon are great. I should do a review of them, I have spectrometer data. fneuf, the R9 of the 4000k are all between the low 70’s and high 60’s on all of mine. CRI Ra was in the 90’s as promised. And they are cheaper than anything else similar.

22

That would be great for NA, CA and Japan members here Joshk!

Do you intend to say that every 4000ishK bulb will struggle with R9 ?

23

I hadn’t noticed the thread-starter was from France, but yes, many members are from NA/CA.
I’m not sure where you are going with the R9 generality, but I will post all the data.

24

I just might have over-interpreted your "the R9 of the 4000k are all between the low 70’s and high 60’s on all of mine" sentence.

By "all of mine" do you mean all your 4000K Hyperikon's or all your 4000K LED lights?

25

Yes, I was talking about the R9 of my 4000k Hyperikon.
My Cree, for example, cost $20 per bulb and have an R9 of about 15.

26

Hyperikon’s Amazon pages are filled with pictures of lights that fried themselves, I assume from overheating. I haven’t seen anywhere close to that many proven failures from any other brand and combined with the cheap price it makes me really wary.

27

I haven’t had any failures yet, but they are only 6 months old so far. So idk.

28

For a while there were Cree-branded light bulbs that were awful

Anyway, cool info. I didn’t know, is E27 standard in Europe? E26 is the standard size in the US.
All of my bulbs are sadly CRI80.

29

It looks like the test data from Indie Cinema Academy is not the high CRI bulb, but Hyperikon’s standard CRI version.

Are you looking specifically for 240V bulbs?

In the US, 120V is almost universally standard.

30

No, but warmer CCT’s do require a stronger red component to match their black body reference. This is difficult to achieve, especially without a hit to efficiency.

So even though a 4000K might have more red in its spectrum than a 5000K bulb, it could have a larger gap to its reference.