Cree have introduced bins based on two-step MacAdam ellipses for their multi-chip XLamp MP-L and MC-E EasyWhite LEDs in warm and neutral CCTs of 2700K, 3000K, 3500K, and 4000K.
When first introduced, the EasyWhite bins for the multichip MC-E were based on 4-step MacAdam ellipses.
The new bins are 94% smaller than the respective ANSI C78.377 quadrangle and 75% smaller than current (4-step) EasyWhite bins.
The narrow bins can only be achieved using multi-chip LEDs. Four white LED “chips” (i.e. chips with phosphor coating) are chosen by Cree, having previously been tested and sorted, so that the resulting mixed white-light output hits the desired color-point range or bin.
This EasyWhite approach eliminates the need to purchase multiple small bins and perform complex color mixing.
EasyWhite binning is a unique feature of Cree multi-chip, lighting-class LED components that enables customers to specify a color temperature and lumen output, simplifying LED system design and improving LED-to-LED color consistency.
Cree says that the new multi-chip LEDs are now available in sample and production quantities with standard lead times.
