Depend on which bin you choose, xp-g3 4500k 90CRI with TIR is quite nice & xp-l2 3-step /4000k /80CRI has very nice pink tint unlike xp-l2 2-step/4000k/90CRI has yellowish tint.
This is not correct.
LED bins are not one Tint or CCT. They are a range of both Tint and CCT. The tighter the binning spec(5, 3, 2 Step MacAdam Ellipse for Cree and smX07, smX05, smX03 for Nichia) the smaller the variation or range.
So, one persons sample can vary, sometimes greatly, in both Tint and/or CCT even when both lights use the exact same bin and type of LED. This has been aptly dimed the "Tint Lottery"
Now, depending on the bin, certain LED's can have a higher percentage of emitters in one spectrum(ie. colour/tint). For instance, as you can see from the datasheet of the 2-Step XP-L2 Easywhite that ZL uses in the new "c" models you have a much higher chance of getting one with a yellowish/greenish tint. In fact, you only have about a 15-20% chance of getting one with a pinkish/magenta tint vs. yellowish/greenish. With the 3-step, your chances are slightly better but the extremes will be worse and you have a chance of getting one that is very pinkish/magenta or yellowish/greenish(much more so then the 2-step). The 5-step is even worse yet.
Three common mistakes I often see on this forum...
1. Using Tint and CCT(correlated colour temperature) interchangeably.
Tint and CCT are not the same thing. Although Tint does change with CCT, Tint is the colour of the light emitted where as CCT is the temperature. Two emitters with the exact same CCT can have totally different tints depending on the samples. A sample that falls far above the black body radiation line can have a strong greenish tint where as one that falls way below can have a strong pinkish tint even though they both might be the same CCT.
2. Assuming all samples of a particular model of a light will have the same tint.
I frequently see threads and posts of people asking what the tint is like on a particular light or what emitter choice has the best tint. Most of the time this is a pointless question as unless the manufacturer is hand selecting(cherry picking) LED's the tints for a particular model can and usually do vary greatly. Just because one person got a nice "pure white" or "creamy" sample, doesn't mean you will. That person just may have won the "Tint Lottery".
3. Assuming all samples of a particular model will have the same CCT or the exact CCT that the manufacture states in the specifications.
Manufacturers specified CCT is "nominal". Just like Tint, LED bins have a range of CCT. For instance, on a regular 5000K(Nominal)5-step Cree emitter colour temps can vary around 300-400 Kelvin so, one person may get a sample that is 5200K while another may get one that's 4800K.