Did you mean an LH351D? Not an XM-L2 package.
I had the same issue. Most people, myself included, have had to file down a separate mcpcb to fit within the Olight body and then somehow reduce the internal thickness, either by filing down the pcb itself or the plastic retaining cup like I did. Here’s the post detailing a couple tidbits. I believe there are some high CRI 5050 emitters like the one used in the HCRI S1 Mini but some have mentioned it’s rather green and lackluster.
I do however support Lexel’s suggestion for an LH351D. I swapped to the 5000k variant after using the 219B 5700k I had initially installed for a little while. One added bonus with filing down the cup was that as the Samsung’s dome is larger than the Nichia’s and sits further into the TIR, the broad beam hotspot Olights are known for is a bit wider, which I like.
Now if I could only find a way to open up my S2R II without totally ruining the bezel ring or optic…
Left: S1R II w/LH351D 5000K
Right: S2R II w/stock SST-40 6500K+
