LH351D 90CRI Spectrum Tests

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thefreeman
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I did an relative output test depending on washer thickness yesterday, I’m not sure if it’s still on topic for this thread or if I should post another one ?

With LH351D bin F2R2S2 from Convoy, washer thickness of 1.26mm :

0.1A 89.2%
0.5A 89.5%
1A 89.6%
2A 89.5%
3A 89.3%

1.00mm :

0.1A 84.5%
0.5A 84.6%
1A 84.2%
2A 84.4%
3A 82.5%

0.85mm :

0.1A 80.8%
0.5A 81.1%
1A 80.9%
2A 80.5%
3A 79.6%

I feel that around 1mm is a pretty good spot since there are no duv gain going further down, while the output continue to decrease.

contactcr
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Kaidomain 5700K @ 1A w/ Frosted TIR:

Sari33
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jon_slider wrote:
for a 2700k option I think the SST-20 might have higher R9 than the 2700k LH351d… not sure.. I have not compared their specs..

here is a link to the Warm SST
Luminus SST-20 J3 JA3 Warm White 2700K CRI95 LED Emitter


pic is a link to the warm LH351d source

According to test,351D 2700k have R9 70+
Maybe not great difference than SST20
fadedmaple
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According to the picture in the simon’s store, the last one should be V2Q1S2

contactcr
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fadedmaple wrote:
According to the picture in the simon’s store, the last one should be V2Q1S2

Updated. His description does not match the picture

Blggg
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Please test Simon’s 4000k.

thefreeman
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I received some more 5000K from Convoy and they are not as good as the ones I got previously, before they were around duv 0.0020~0.0030 at 100mA, now around duv 0.0035~0.0050, It makes me wonder if its the same reel as before or a new one with a different color bin, this is quite disappointing.

I got some 5700K too, but there have been a mistake because they test the same as the 5000K.

Here is another one 2700K from Sofirn to compare with contactcr one, same beaded TIR as before (same distance, so lux can be compared) :

0.1A Ambient = 1726.1 Lux, CCT = 2701K (Duv 0.0013) Color Rendering Index (Ra) = 95.9 [ R9 = 74.5 ] IES TM-30-15 Rf = 94.10 Rg = 99.50

0.5A Ambient = 6778.6 Lux, CCT = 2714K (Duv 0.0010) Color Rendering Index (Ra) = 95.5 [ R9 = 73.0 ] IES TM-30-15 Rf = 94.00 Rg = 99.99

1A Ambient = 12251.9 Lux, CCT = 2722K (Duv 0.0007) Color Rendering Index (Ra) = 95.1 [ R9 = 71.5 ] IES TM-30-15 Rf = 93.61 Rg = 100.34

2A Ambient = 21058.3 Lux, CCT = 2720K (Duv -0.0003) Color Rendering Index (Ra) = 94.5 [ R9 = 68.4 ] IES TM-30-15 Rf = 92.71 Rg = 100.80

Sliced 1mm :

0.1A Ambient = 2298.4 Lux, CCT = 2435K (Duv -0.0013) Color Rendering Index (Ra) = 96.0 [ R9 = 74.0 ] IES TM-30-15 Rf = 93.27 Rg = 101.86

0.5A Ambient = 9113.0 Lux, CCT = 2448K (Duv -0.0016) Color Rendering Index (Ra) = 95.5 [ R9 = 72.0 ] IES TM-30-15 Rf = 92.54 Rg = 102.25

1A Ambient = 16433.9 Lux, CCT = 2459K (Duv -0.0019) Color Rendering Index (Ra) = 95.1 [ R9 = 70.2 ] IES TM-30-15 Rf = 91.87 Rg = 102.53

2A Ambient = 28013.9 Lux, CCT = 2464K (Duv -0.0027) Color Rendering Index (Ra) = 94.3 [ R9 = 66.6 ] IES TM-30-15 Rf = 90.77 Rg = 102.79

stephenk
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thefreeman wrote:
I received some more 5000K from Convoy and they are not as good as the ones I got previously, before they were around duv 0.0020~0.0030 at 100mA, now around duv 0.0035~0.0050, It makes me wonder if its the same reel as before or a new one with a different color bin, this is quite disappointing.

I got some 5700K too, but there have been a mistake because they test the same as the 5000K.

Here is another one 2700K from Sofirn to compare with contactcr one, same beaded TIR as before (same distance, so lux can be compared) :

0.1A Ambient = 1726.1 Lux, CCT = 2701K (Duv 0.0013) Color Rendering Index (Ra) = 95.9 [ R9 = 74.5 ] IES TM-30-15 Rf = 94.10 Rg = 99.50

0.5A Ambient = 6778.6 Lux, CCT = 2714K (Duv 0.0010) Color Rendering Index (Ra) = 95.5 [ R9 = 73.0 ] IES TM-30-15 Rf = 94.00 Rg = 99.99

1A Ambient = 12251.9 Lux, CCT = 2722K (Duv 0.0007) Color Rendering Index (Ra) = 95.1 [ R9 = 71.5 ] IES TM-30-15 Rf = 93.61 Rg = 100.34

2A Ambient = 21058.3 Lux, CCT = 2720K (Duv -0.0003) Color Rendering Index (Ra) = 94.5 [ R9 = 68.4 ] IES TM-30-15 Rf = 92.71 Rg = 100.80

Sliced 1mm :

0.1A Ambient = 2298.4 Lux, CCT = 2435K (Duv -0.0013) Color Rendering Index (Ra) = 96.0 [ R9 = 74.0 ] IES TM-30-15 Rf = 93.27 Rg = 101.86

0.5A Ambient = 9113.0 Lux, CCT = 2448K (Duv -0.0016) Color Rendering Index (Ra) = 95.5 [ R9 = 72.0 ] IES TM-30-15 Rf = 92.54 Rg = 102.25

1A Ambient = 16433.9 Lux, CCT = 2459K (Duv -0.0019) Color Rendering Index (Ra) = 95.1 [ R9 = 70.2 ] IES TM-30-15 Rf = 91.87 Rg = 102.53

2A Ambient = 28013.9 Lux, CCT = 2464K (Duv -0.0027) Color Rendering Index (Ra) = 94.3 [ R9 = 66.6 ] IES TM-30-15 Rf = 90.77 Rg = 102.79

So how green are new 5000k ones from Convoy?
contactcr
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To put his numbers into perspective 0.003 to 0.0035 DUV is about “average” for most LH351D’s we have seen but the higher end of his range gets into the “overly” green territory.

nightwalker
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thefreeman wrote:
I received some more 5000K from Convoy and they are not as good as the ones I got previously, before they were around duv 0.0020~0.0030 at 100mA, now around duv 0.0035~0.0050, It makes me wonder if its the same reel as before or a new one with a different color bin, this is quite disappointing.

That’s unfortunate. At the beginning of August I ordered some too because the product page specifically stated SPHWHTL3DA0GF4RTS6 Bin F2R2S2, which I thought was the most desired. Unfortunately I have no way to test them other than to visually compare to my Sofirn SP36 5000K. I’ll have to do that eventually… I wonder if/when the old stock ran out and new bin started being sold.

I really appreciate when vendors specify the actual LED bin, but always have to question the age of the information…

Attempting to build a Convoy of Convoys.

thefreeman
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I ordered the 1st ones early August, the seconds early September.

thefreeman
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Since Sofirn sourced 2700K were nice I bough some more to put in some light bulbs, I also took one 5000K and 4000K to see how they test :

4000K :

0.1A Ambient = 1829.6 Lux, CCT = 3905K (Duv 0.0044) Color Rendering Index (Ra) = 92.9 [ R9 = 72.9 ] IES TM-30-15 Rf = 91.51 Rg = 99.27

0.5A Ambient = 7292.8 Lux, CCT = 3928K (Duv 0.0037) Color Rendering Index (Ra) = 92.4 [ R9 = 71.5 ] IES TM-30-15 Rf = 91.43 Rg = 99.85

1A Ambient = 13191.3 Lux, CCT = 3943K (Duv 0.0030) Color Rendering Index (Ra) = 92.1 [ R9 = 70.7 ] IES TM-30-15 Rf = 91.18 Rg = 100.29

2A Ambient = 22691.5 Lux, CCT = 3956K (Duv 0.0013) Color Rendering Index (Ra) = 92.2 [ R9 = 70.1 ] IES TM-30-15 Rf = 90.81 Rg = 100.58

5000K :

0.1 Ambient = 2210.7 Lux, CCT = 4730K (Duv 0.0030) Color Rendering Index (Ra) = 92.7 [ R9 = 58.1 ] IES TM-30-15 Rf = 89.52 Rg = 97.55

0.5 Ambient = 8847.3 Lux, CCT = 4817K (Duv 0.0038) Color Rendering Index (Ra) = 91.8 [ R9 = 54.3 ] IES TM-30-15 Rf = 89.75 Rg = 97.91

1 Ambient = 16101.2 Lux, CCT = 4870K (Duv 0.0039) Color Rendering Index (Ra) = 91.3 [ R9 = 51.7 ] IES TM-30-15 Rf = 89.70 Rg = 98.05

2 Ambient = 28038.4 Lux, CCT = 4949K (Duv 0.0037) Color Rendering Index (Ra) = 90.7 [ R9 = 48.7 ] IES TM-30-15 Rf = 89.47 Rg = 98.33

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