LH351D 2700K 90CRI

Sorry for the poor formatting. Tested a LED from DigiKey I haven’t seen anyone purchase yet. Used a 20mm Carclo frosted optic.

100mAh

Spectrum from 380.000000 to 730.000000 nm in 106 steps
0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.001, 0.003, 0.024, 0.057, 0.099, 0.172, 0.299, 0.491, 0.776, 1.190, 1.746, 2.449, 3.382, 4.567, 5.643, 5.908, 5.113, 3.978, 3.277, 3.033, 2.878, 2.663, 2.554, 2.695, 3.075, 3.580, 4.146, 4.755, 5.414, 6.057, 6.638, 7.128, 7.525, 7.812, 7.994, 8.150, 8.347, 8.606, 8.905, 9.201, 9.508, 9.824, 10.175, 10.562, 11.004, 11.450, 11.867, 12.153, 12.316, 12.441, 12.672, 13.036, 13.429, 13.803, 14.111, 14.423, 14.694, 14.966, 15.299, 15.814, 16.508, 17.251, 17.984, 18.667, 19.334, 19.886, 20.300, 20.617, 20.860, 21.030, 21.067, 21.010, 20.841, 20.543, 20.068, 19.426, 18.659, 17.784, 16.865, 15.952, 15.044, 14.160, 13.275, 12.413, 11.561, 10.743, 9.933, 9.139, 8.405, 7.725, 7.089, 6.488, 5.953, 5.471, 5.033, 4.616, 4.221, 3.852, 3.489, 3.136

Result is XYZ: 1010.394189 902.329383 248.344124, Yxy: 902.329383 0.467544 0.417539

Ambient = 902.3 Lux, CCT = 2649K (Duv 0.0019)

Color Rendering Index (Ra) = 95.9 [ R9 = 77.0 ]

R1 = 96.5 R2 = 96.9 R3 = 96.0 R4 = 97.8 R5 = 96.3 R6 = 97.2 R7 = 96.5

R8 = 90.4 R9 = 77.0 R10 = 92.2 R11 = 98.9 R12 = 89.5 R13 = 96.4 R14 = 96.9

500mAh

Spectrum from 380.000000 to 730.000000 nm in 106 steps
0.066, 0.066, 0.066, 0.066, 0.066, 0.066, 0.066, 0.098, 0.154, 0.287, 0.531, 0.907, 1.503, 2.378, 3.653, 5.412, 7.664, 10.384, 13.752, 17.741, 21.105, 21.693, 18.943, 15.131, 12.604, 11.518, 10.850, 10.103, 9.736, 10.177, 11.437, 13.171, 15.163, 17.318, 19.629, 21.889, 23.949, 25.726, 27.192, 28.285, 28.997, 29.618, 30.400, 31.412, 32.545, 33.647, 34.777, 35.909, 37.163, 38.557, 40.131, 41.744, 43.271, 44.344, 44.980, 45.516, 46.438, 47.870, 49.421, 50.889, 52.101, 53.325, 54.378, 55.413, 56.635, 58.487, 60.962, 63.586, 66.175, 68.560, 70.865, 72.747, 74.115, 75.131, 75.876, 76.362, 76.377, 76.062, 75.361, 74.203, 72.426, 70.040, 67.195, 64.009, 60.696, 57.408, 54.166, 51.020, 47.876, 44.784, 41.743, 38.819, 35.922, 33.094, 30.472, 28.023, 25.732, 23.563, 21.641, 19.915, 18.341, 16.839, 15.407, 14.075, 12.763, 11.482

Result is XYZ: 3707.844584 3304.521708 948.220008, Yxy: 3304.521708 0.465775 0.415110

Ambient = 3304.5 Lux, CCT = 2654K (Duv 0.0012)

Color Rendering Index (Ra) = 95.4 [ R9 = 74.5 ]

R1 = 95.9 R2 = 96.8 R3 = 96.3 R4 = 96.9 R5 = 95.8 R6 = 97.0 R7 = 95.5

R8 = 89.0 R9 = 74.5 R10 = 92.0 R11 = 98.2 R12 = 89.9 R13 = 96.0 R14 = 97.2

750mAh

Spectrum from 380.000000 to 730.000000 nm in 106 steps
0.096, 0.096, 0.096, 0.096, 0.096, 0.096, 0.096, 0.183, 0.340, 0.624, 1.107, 1.909, 3.176, 4.966, 7.498, 10.964, 15.376, 20.579, 26.840, 34.083, 40.061, 41.033, 36.051, 29.151, 24.446, 22.273, 20.912, 19.518, 18.846, 19.615, 21.893, 25.106, 28.856, 32.911, 37.246, 41.498, 45.407, 48.818, 51.654, 53.807, 55.258, 56.531, 58.102, 60.106, 62.353, 64.526, 66.716, 68.906, 71.337, 74.041, 77.101, 80.237, 83.225, 85.364, 86.680, 87.830, 89.741, 92.626, 95.761, 98.730, 101.193, 103.687, 105.848, 107.956, 110.382, 114.018, 118.849, 123.955, 128.960, 133.544, 137.959, 141.530, 144.111, 146.013, 147.390, 148.278, 148.254, 147.601, 146.209, 143.938, 140.463, 135.822, 130.322, 124.168, 117.758, 111.420, 105.180, 99.143, 93.085, 87.107, 81.220, 75.572, 69.983, 64.504, 59.417, 54.684, 50.267, 46.065, 42.332, 38.981, 35.924, 33.015, 30.226, 27.636, 25.072, 22.562

Result is XYZ: 7197.824480 6387.703729 1826.003535, Yxy: 6387.703729 0.467041 0.414476

Ambient = 6387.7 Lux, CCT = 2632K (Duv 0.0009)

Color Rendering Index (Ra) = 95.2 [ R9 = 73.2 ]

R1 = 95.6 R2 = 96.8 R3 = 96.5 R4 = 96.5 R5 = 95.6 R6 = 97.0 R7 = 95.1

R8 = 88.2 R9 = 73.2 R10 = 91.9 R11 = 97.9 R12 = 90.2 R13 = 95.8 R14 = 97.3

1000mAh

Spectrum from 380.000000 to 730.000000 nm in 106 steps
0.165, 0.165, 0.165, 0.165, 0.165, 0.165, 0.165, 0.264, 0.486, 0.894, 1.563, 2.650, 4.295, 6.550, 9.646, 13.815, 19.040, 25.087, 32.270, 40.590, 47.737, 49.585, 44.770, 37.260, 31.591, 28.643, 26.791, 25.002, 24.027, 24.648, 27.037, 30.606, 34.848, 39.454, 44.385, 49.264, 53.801, 57.825, 61.239, 63.882, 65.710, 67.345, 69.324, 71.812, 74.551, 77.178, 79.835, 82.457, 85.345, 88.576, 92.243, 96.016, 99.640, 102.274, 103.987, 105.525, 108.012, 111.717, 115.722, 119.516, 122.705, 125.908, 128.672, 131.344, 134.366, 138.798, 144.640, 150.764, 156.716, 162.127, 167.310, 171.468, 174.402, 176.501, 177.973, 178.872, 178.693, 177.748, 175.943, 173.127, 168.878, 163.237, 156.595, 149.164, 141.441, 133.859, 126.411, 119.193, 111.969, 104.833, 97.803, 91.061, 84.372, 77.834, 71.767, 66.115, 60.821, 55.783, 51.317, 47.311, 43.650, 40.151, 36.801, 33.678, 30.595, 27.572

Result is XYZ: 8711.560363 7699.208821 2246.763775, Yxy: 7699.208821 0.466919 0.412660

Ambient = 7699.2 Lux, CCT = 2620K (Duv 0.0002)

Color Rendering Index (Ra) = 95.0 [ R9 = 71.7 ]

R1 = 95.5 R2 = 97.0 R3 = 97.1 R4 = 96.0 R5 = 95.5 R6 = 97.2 R7 = 94.4

R8 = 87.3 R9 = 71.7 R10 = 92.4 R11 = 97.4 R12 = 90.9 R13 = 95.8 R14 = 97.6

2000mAh

Spectrum from 380.000000 to 730.000000 nm in 106 steps
0.390, 0.390, 0.390, 0.390, 0.390, 0.390, 0.390, 0.689, 1.154, 1.863, 2.963, 4.592, 6.827, 9.673, 13.401, 18.255, 24.185, 30.845, 38.672, 47.992, 56.903, 61.609, 60.127, 54.920, 49.449, 45.138, 41.677, 38.638, 36.653, 36.241, 37.705, 40.657, 44.654, 49.207, 54.211, 59.235, 64.107, 68.669, 72.738, 76.062, 78.529, 80.829, 83.561, 86.868, 90.441, 93.799, 97.111, 100.360, 103.917, 107.904, 112.482, 117.272, 121.984, 125.604, 128.211, 130.704, 134.458, 139.776, 145.511, 150.962, 155.564, 160.053, 163.814, 167.267, 170.975, 176.298, 183.193, 190.297, 197.064, 203.053, 208.690, 212.988, 215.730, 217.440, 218.414, 218.753, 217.840, 216.079, 213.351, 209.485, 204.010, 196.956, 188.764, 179.716, 170.389, 161.261, 152.357, 143.789, 135.222, 126.773, 118.467, 110.503, 102.601, 94.860, 87.676, 80.987, 74.718, 68.739, 63.431, 58.669, 54.318, 50.145, 46.119, 42.361, 38.618, 34.934

Result is XYZ: 10416.386721 9137.475806 2817.420456, Yxy: 9137.475806 0.465614 0.408447

Ambient = 9137.5 Lux, CCT = 2605K (Duv –0.0012)

Color Rendering Index (Ra) = 93.9 [ R9 = 65.9 ]

R1 = 94.2 R2 = 97.2 R3 = 98.5 R4 = 93.9 R5 = 94.4 R6 = 97.1 R7 = 92.2

R8 = 83.8 R9 = 65.9 R10 = 92.9 R11 = 95.0 R12 = 91.1 R13 = 94.9 R14 = 98.6

Could use some more numbers.

They should be really good for tint mixing and stuff like the BLF Lantern if they end up being able to source the 2700K

Units of current is A or mA . Ah or mAh means charge. (Current 1A go during 1 hour . Please fix.

Thanks for the VERY detailed report! Seems like the 2700K is not all that green. Decent warm white HI CRI on its own but perfect for CCT mixing as pointed out above. 5000K + 2700K will result in a very nice 4000K tint

Agreed, they should not be badly green. I am not a fan of lights warmer than 3000k, but I bet this would mix well with a couple of SST20’s at 4000k.

Time to arrange some group buy for LH351D?
Shipping from US to EU takes over $20 at Mouser. Insane! (do they carry it by themselves?)

we are going to use it in a variable temperature flashlight :nerd_face:

Looks like 351D is taking a big chunk of LED market over SST20 and looks like 219’s…
Or is it just me?

What raw lumens can one expect at 2A or 3A with the LH351D 2700K?

LEd calculator

shaved LH351d 2700k in a Nitecore EX11.2
0.2 to 275 lumens w a fresh 16340
0.02 to 120 lumens with a used CR123 @ 2.88v

nice pinky :slight_smile:

anywhere to buy rather DigiKey ?

their shipping cost is outrageous

Sofirn sells the LH351D as used in the LT1, 2700K and 5000K. They are on their own website under accessories or parts or something like that. Less than $2 each IIRC. $20 gets free shipping

Link to buy LH351D bare emitter, choose 2700K 90CRI or 5000K 90CRI

$1.59 per led, please buy them with other products.

https://sofirnlight.com/lh351d-emitter-p0054.html

Thanks

will get with bunch other stuff from sofirn soon.

What if I wanted to buy them separately?

Oops. Sorry.

what is that LED?

just ordered a few 2700k LH351d plus a Low/High C01s

That’s the bespoken LH351D 2700K, ordered from Sofirn (WB: “Daylight”)