I don't remember anyone mentioning this, but Rambus has come out with a series of PAR and BR designs that allow the user to manually adjust the color temperature from 5000k to 3000k (and anywhere in between). In essence, by moving a lever, a remote phosphor slides over the 5000k LEDs, and this lowers the color temperature.
Video describing the technology here:
Rambus' web page for the BR30 bulb:
First licensed design (but this version seems to be fixed at 3000k):
they also have a pretty nifty looking A19 bulb, but the color temperature does not look adjustable.
Video describing the technology here:
Rambus' web page for the BR30 bulb:
First licensed design (but this version seems to be fixed at 3000k):
they also have a pretty nifty looking A19 bulb, but the color temperature does not look adjustable.