GB 351D closed.

Thanks for the comparison. So they are not using the same TIR? From my own experiences, the LH351D 4000k is even more greener than the E21A 4000k than the difference shown in your pic but batch migh not be the same. The LH351B doesn’t seem to have any green but would need a known good WW emitter like the SST-20-W or E21A 3000k to compare with.

Has anyone tested the LH351B 2.200K 80CRI or 3.000K 90CRI yet? I wish there was a nice chart to see how it performs at certain current settings. I assume it's not appropriate to use it with direct drive, is it?

I did a quick test on the 3000K 90CRI LH351B but only up to 2.5A to preserve it.

I have some of the 2200k in the mail, ill post what they test out as. CRI at least

Here’s some more data on the 3000K 90CRI LH351B.

They’re using different angle beaded TIRs. Lost track on which one’s which because of all the swapping. All I remember is that the e21A 4000K uses Yajiamei 60° and the SST20 4000K 20° beaded from Convoy Store. The rest are either 38, 45 or 60°.

I got the LH351D 4000K from Led4Power. Not sure from which batch its from. It’s a little bit green when compared side by side with E21A or even SST-20 but its ok with me and I don’t notice it in actual use. I might try some LEE Minus Greens when they arrive.

I don’t have SST-20 or E21A 3000K yet but I do have some arriving so I’ll try to compare later. I do like the tints of these LH351Bs and don’t find them greenish or yellowish at all. But I do notice that I have a little bit higher tolerance going above BBL compared to a few very sensitive people here.

If you have time for this I could send you 2200k , current bin of 351D 4000, and new bin of 351B 3000k and 351D 5000k 90cri for testing.

Finally

5000k?

Part number breakdown for those who are curious. The order code will typically have the last six digits F4RTS6, which covers a relatively broad range of forward voltage, color temperature, and output ratings.

There is also a reel specific code that refines those last 6 digits: F2R1S2
F2 = 2.8-3.0V (good)
R1 = Tint bin straddling the BBL, 5000-5300K (good)
S2 = 380-400 lumens at 1050mA (fair)

Specs sound good.

I try to test led with reflector and frosted lens to mix everything

CCT = 4830K (Duv 0.0025)

Color Rendering Index (Ra) = 91.1 [ R9 = 56.1 ]
R1 = 91.5 R2 = 92.5 R3 = 92.9 R4 = 92.5 R5 = 91.2 R6 = 89.6 R7 =
93.9
R8 = 85.0 R9 = 56.1 R10 = 82.2 R11 = 92.9 R12 = 72.3 R13 = 91.6 R14 =
96.6

without reflector Duv changes from –0.007 in center to 0.007 at edges.

Hi Andrey,

Are you still planning to offer LH351D 3.000K 90CRI? I would be very much interested into some of these, e.g. for a nice triple individual of 3.000K/4.000K/5.000K. :-)

Cheers, Thomas

Hi , Thomas

When I sold all 4000K and 5000K I will try 3000k)

When you planned send 5000k?

I can begin to send at Monday. But it takes to send PMs.

i sent but without respond

Hi Andrey,

What are the chances to get some LH351D 5.000K 70CRI with better bin than W6 and/or some LH351D 5.700K 70CRI?

Thank you for the measurement. This result is resembling to a Nichia 219C of the same CCT regarding Ra (R9 could be a bit better, R2, R3, R13, R14 seems to be marginally weaker, R12 is marginally better) - which is a good result considering, that LH351D has better efficacy, than 219C.

What current did you use for the measurement?

Sent two message without your respond.
I decided to give up buying from you.