- No stock for all Ra9050 and Ra9080 219B/C series. The lead time could be anytime between 1,5 - 2 MONTHS!
Nichia headquarter decided to (temporarily?) stops the sw45k production. Don’t know why. 4500K has been a rare CCT in Nichia these days. My earlier sm453 9050 144A purchase delayed by almost a full month. Then I only got sw45k 9080 219B in limited quantity.
I’m still trying to get whatever stock left there.
I am pussled about that if you mean cooler than the spill. I would have expected the opposite?
Is’nt the hot spot supposed to be warmer as the reflector collects the (sideways) rays that have passed through most yellow phosphor?
All the Nichias I have tested have a cooler hotspot than spill. Cree is opposite. What I meant that the difference was larger than with the 219 series. This might have something to do with the two stage reflector of the TM03 (which also hides any egg yolk effect djozz also mentioned). I tested a 144 series led with a normal reflector (from the X6) that produced the warm yellow center.
144A yellow spot fix: any mild diffuser will do, OP reflector, colour mixing TIR, or any TIR specially designed for 144A (some Ledil)
The wider the beam angle of the optics/reflector the less the yellowing effect.
Unlike XHP50, sanding or roughing the lens dome has minimal effect. Only enlarge/smoothen the edge of the hotspot. I tried it
Slicing the dome will most probably works (plus more throw and slightly less output).
I think it is much. To compare with it, take the D50 point.
If I use x,y= 0.3455,0.351 for this point it gives in my calculations CCT= 5002 K and an offset from the BB curve of 4.6 CIELuv. This offset can be clearly seen as greenish. (1 CIELuv is about the least color difference that can be seen as you know).
Your low to high distance I would guess is around 7-8 CIELuv. That amount I usually correct with a Lee filter “279 Eighth Minus Green” (not so usable here as tint changes).
I only brought this up because I made a S2+ with 219C CRI90 sm403 with PWM at 2.8A and it looked surprisingly green until I lowered the PWM current to 700mA. The specs also shows that tint shoots up in y value with current, somewhat compensated by temperature but only the high CRI model has this speciality.
In the data sheet, not all grouping ellipses follow the BBL symmetrically. The cooler temp slowly leaves the BBL as the temp raised. The 573 lower part ellipse barely touched the BBL. This risky balance is what makes up for better efficiency in 219C I guess.
For those who really don’t want even the slightest green sw45k 219B is the best bet, far away below the green zone. If you still want the the 219C, stick with the 3 steps and no higher than sm403.