Which LED today performs the best dedomed?........

[EasyB]

@~~X3~~

Has anyone compared a sliced SST20 with a dedomed XP-G2 ?

I did an approximate comparison.

Luminus SST-20-W 6500 K CRI70 color and output test

I sliced and measured the throw of an SST20 L2 BA 6500K I got from KD. I read people were having problems with solvent dedoming and killing the bond wires, similar to with the SST40, so I went straight for slicing. I have sliced a few SST40s and it’s worked well. The bond wires limit how close to the die you can slice the silicone, so I have been slicing very close to the die over most of the area while leaving the silicone thicker around the bond wires. I used the same method with the SST20, pi…

It falls short of the dedomed XPG2 by a bit. This could be partly because it is not a complete dedome, just a close slice.

Also, I wonder if the die size is slightly larger than the XPG2. I think this is the case with the SST40 vs XPL. At the same current I measured the dedomed SST40 having 10% less luminance than dedomed XPL V6. I think koef measured the SST40 die area to be about 10% larger.