Do you mean the Gen I or Gen II probably has SW45 instead of SW45k?
So far I’ve tried these:
ROT66 gen 1 with 219B SW45K
ROT66 gen 2 with 219B SW45k
also
PL47 gen 1 with 219 SW45K
PL47 gen 2 with 219 SW45K
in both instances, the Gen 1 (both ROT66 & PL47) with 219B SW45K look a bit more rosy.
the Gen 2 (both ROT66 and PL47) with 219B “SW45k” also look rosy, but when I compare with the Gen 1 versions, it looks like to my eyes there is a purplish hue for both the Gen 2 ROT66 and PL47.
Would a “purple” hue point more to the SW45 or the SW45K?
The “k” code indicates a tint far below the BBL, so the more rosy/purple they appear the higher likelihood they’re sw45k.
My gen 1 PL47 seemed to have sw45k but some beamshots of the gen 1 ROT66 look very much like they aren’t. Flashaholics has a comparison of Gen 1 and 2 ROT66 on his youtube channel and Gen 2 is much rosier.
I also did a comparison of the Fireflies ROT66 gen 1 and gen 2 with Nichia 219B SW45K:
In the video below, my camera doesn't seem to capture the "rosy pink" that well -- the ROT66 gen 1 Nichia look more rosy pink, to my eyes, whereas the ROT66 gen 2 Nichia 219B looks like rosy purple, to my eyes..