tint shift during first few hundred hours?

i modded a few lamps with nw rebel high cri leds.
i noticed a definate purplish hint to the finished lamp.
its been in use a year.i noticed it does not have this odd spike in its output anymore.
i noticed this when i fired up an emergency lamp made with the same leds.its set up for 12v.
it has about 2 hours of use.and it shows this odd purplish hint.
anyone else notice this?
its like the phosphore has to “break in” and match the pump led.