Good catch, THE_dAY very kindly gifted me three Nichia 219B V1 4000K leds from Illumn.com, they are underway somewhere. When they are in I will test one (not to death, I will use them for a triple). I am mainly curious about the Vf compared to the old 219B and the 219C.
This is fantastic! I canāt tell you how many times Iāve referenced your data/tests to compare information for purchasing a particular light. Like most of the previous posts have said, your work is invaluable.
Hi djozz, lot of charts, but no V1. The one I am trying to findā¦
I already use the 219B V1 sw50 (5000k) @ max 2,4A* for momentary use, without issue, so far so good. It replace an old XML-T6. Temperature management seems to be more an issue than tint shift, get hot fastā¦ Anyway, not using max for more than 1mn.
The 219Cāchart you released lately looks great for a 80CRI. Do you think it would be possible to replace a XP-L HI with a 219C (I donāt mind loosing lumens, but the XP-L HI is really too cool) or it would be better to simply use a XP-L warm high CRI?
Even tough the 219C has some slight turquoise tint, the CRI is nicer compare to factory XM-L2 and other Cree cool white emittersā¦
Still prefer the 219B-V1 as a high CRI neutral white but above 2.5 ā3A the 219B-V1 may fry easilyā¦
I would like to build a high CRI thrower single 18650ā¦ But with a reflector larger than ET sticksā¦
(*2,4A was measured with XML)
I was also wondering:
If a dedomed XP-G match the beam profile of a dome XP-E, does a dome 219C (which is close to a XP-G) would have the same beam than a XP-L HI (which surface is wider than XPG/219B and equivalent to a XP-L dedomed) within same reflector, of courseā¦
The 219B-V1 I have been using have a nice low Vf. Had a triple hooked up to a 105C 8*0,35+6*0,38 and guess what: Even with my very long and thin dmm probes I got 5.08A!!! I wouldnāt try these with a FET-driver, not even a triple, way too much amps, too much heat generated. A member of the german forum fried a triple with a FET-driver, got over 16A initially.
Outstanding work djozz! Keep it going please, very appreciated.