I’m not sure the Digi-Key rep got the color temp for T4 quite right. Looking at the datasheet and trying to scale the chart on page 10, here’s how I read it:
T6 should be 4000K to 4125K, and Duv roughly +.002 to -.004
T4 should be 3750K to 3875K, and Duv roughly .004 to.010.
It looks like there could be a choice to make between rosier tint at a warmer color temperature versus a color temperature with broader appeal plus 20 lumens and a chance of just enough of a greenish tint that discerning users might notice.
As a related reminder, Maukka seemed pretty happy with a Carclo triple-equipped light he modded with LH351D’s (TC bin?) that measured at +.0036 Duv (assuming “medium” is the closest condition to the binning conditions of 1050mA).
I also would prefer below the BBL, but I’m being open-minded because I know some people have stronger feelings about color temperature than I have about small positive Duv values.
What encourages me most about Maukka’s testing of LH351D’s with a similar or worse Duv than a T6 should have is he saw limited tint-shift across the beam in a Carclo optic. Find a rainbow beam more distracting than slight deviations from the BBL.
Yeah its very green corona/hotspot that is the worst. I can stand above BBL if it’s consistent across the beam (and the CCT doesn’t shift too much either).
I’ve been pretty happy with the 4000K LH351Ds I got from Mtn-Elec that I put in my Q8. Don’t have any idea what tint bin they are but less green than a lot of Cree emitters I’ve seen that weren’t specifically binned for on/below BBL.