Ok, so today I stole a few minutes to install the XHP70.2 80CRI 4000k in the V2 prototype. HM440H model for anyone interested.
I LOVE THIS LED!
This LED looks SO much better then the 4000k 70CRI that was in it before. It is a lower bin and it lost some output but not as much as I would have thought. Still easily as bright as an XHP70 except without as much of a dark spot and with 80cri.
I tried a few different sized centering rings. Throw readings showed a peak of ~440kcd (vs ~450kcd for the 70cri) with a 2mm centering ring.
Although I am going to print up a new centering ring that is ~4mm tall since manual focusing shows that around there throw only drops to ~430kcd yet the dark spot virtually disappears. WELL worth the trade off.
So what do I end up with?
A ~6000 lumen (possibly more since the throw readings are so close to the 70CRI @ 7000 lumens) 80CRI 4000k 1300m+ throw GT with corona tint shift hardly worse then the stock XHP35.
This light will be keeping this setup for sure, it is fantastic! I would never have guessed that the 80cri version would have this kind of improvement in the tint shift issues. I still don’t know why but it has very little tint shift (not perfect but only slightly worse then the XHP35 that comes stock once focused).
I expect that slicing the dome would have similar results to the 70CRI version with ~1600m+ of throw but I am not willing to risk another $10 LED to find out right now, maybe if I get board or feel lucky later.
Or if someone wants to donate an LED to the cause I can put it on the sphere to test the output and try slicing the dome to see those results as well.