Thanks for the output numbers, the difference is not enormous when regulated at the same current. But I like that 3500K so I’m sure that the leds that I will get from you will end up somewhere nice
Just curious has anyone tested how shaving affects the amount of blue light output? I’m guessing since you are only cutting off the transparent silicone and not really removing the phosphor, the amount of blue light emitted shouldn’t change much but just wonder if anyone knows.
The domed shape of silicone is essential for the function, makes sure that as many as possible photons hit the surface close to perpendicular to it, so that internal reflection is minimised and thus photon extraction maximised.
When the dome is shaved off, the surface is flat and much more internal reflection occurs, photon extraction decreases, and also more photons have an extra chance of hitting the phosfor. Especially the blue photons are absorbed by the phosfor and converted to photons of longer wavelength.
The result is that overall a bit less light exits the led, a reduction of the blue peak and increase of green and red.
I installed the LH351D 3500k this past weekend in one of the FW3A’s I have and I must say this is a really nice led. Even with a narrow optic, the beam is a little wide. It adds a wonderful warm glow to everything and really is nice in the outdoors.
I’m going to reserve the remaining 3500K LEDs for my own stash and one last potential buyer.
If people still want more you can certainly post your interest here and I may buy another 100x if there is demand but it seems like people are not so interested in LH351D compared to 5 year old 219B LED, lol. Alternatively, US buyers can buy from DigiKey for the higher cost per LED+shipping. Wasn’t out to make money just wanted more people to try a good LED
The other random LEDs are still available and I am willing to do envelope shipping world wide.
Can I still buy some of the 3500K LH351D LED’s? Maybe 10x? I don’t mind paying more for international shipping. I think I paid around $13 the few times I bought LED’s from azhu.
Give me until mid/end of coming week to gauge interest and see what last buyer wants. I also want to make sure more of my international packages arrive just in case.
The Lumintop optic is a diffused lense so output loss is between Carclo 10507 and 10508. I’m pretty sure you are using the 10507 in the SST-20 version, so considering this, your results are very good. Btw, have you compared the turbo output?
BlueSwordM thinks he may be able to get a good batch of 4000K LH351D so i’m going to hold off on buying more 3500K until more details are available on that.