If you feel like it, you could also do some staged slicing measurements in some other emitter. I mean, to see how does it compares a not so close slicing versus a close one with regards to output, hotspot size, temperature and CRI. Should be a gradual regression/progression in those parameters, I believe.
Yes if you use a new one. Some people use very fine sandpaper to polish it but i’m not sure anyone has proven that to be of any benefit and it can even be harmful if bond wires are involved.
Try one partial slice as a test, it’s generally very smooth. Then, go for a deeper second cut.
Edit: this is probably obvious but you want to make sure it’s soldered to an MCPCB so you have something to securely hold it. You can use a flat washer over the top as a guide if you can get it to the right height or just freehand it.
I am waiting for the LH351D 5000K 90CRI to arrive at you
I would be very happy, if I could see spectral/CRI measurement before I will buy them. If results are promising, I might exceed my initial interest numbers.
I can remember, that you have (or you did have) LH351B 2200K of two different performance bins. What is your current stock of them?
Managed to put LH351B 2200K in my EagleEyes X1R. I really like them warm CCTs. Quick photos with my smartphone (WB Daylight).
Left to Right: EE X1R (219C 2700K), EE X1R (LH351B 2200K), OTR M3 Pro (Nichia E21A 2000K). All with TIR Optics.
Not visible in the photo but 351B 2200K definitely warmer than 219C 2700K in real life. But still not as warm as I wanted it to be. Candle like E21A 2000K still my favorite of the bunch.
Left to Right: Cricket knockoff lighter in TURBO, OTR M3 Pro E21A 2000K + diffuser, EE X1R LH351B 2200K + diffuser
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?