What happened to 219B?

[Bob_McBob]

@iamlucky13

I was not aware SW45 (non-K) was not actually available in R9080, but I’ll take Bob McBob’s word for it. I guess one or the other of my lights might have actually had R85.

Maukka’s ROT66 measurement technically meets R9080, but is consistent with Bob McBob’s statement about the typical performance of R85 219B’s.

Also, here is the chromaticity diagram showing the range of DUV possible within SW45K that Bob mentioned. It looks like the theoretical range is even bigger than he stated, but from tint measurements I’ve seen shared, the numbers he mentioned seem realistic.

As far as I know, any R85 219B would be the original version, which looks quite a bit different and has a higher Vf.

Edit: I take that back, when djozz was reviewing R85 from Kaidomain in early 2014, they already looked like the current version: testing two of KD's new Nichia 219b leds (4500K'92CRI' and 5500K)

I don’t have any reason to suspect the original ROT66 didn’t use D220 R9080 sw45k as Fireflies claimed. I believe they ordered an entire reel straight from Nichia, and I seem to recall the label being posted somewhere. The limits I gave are calculated from the CIE coordinates in the datasheet and are specifically at the rated current, so in actual use sw45k can be much rosier (D200 often measures –0.0180 at 3A in an SC64c). The “official” spec is 4260K to 4745K at 700mA. All my ROT66s measure reasonably close to known D220 reels I’ve used.