In the dim-to-warm mode, the user may select a brightness from brightness control 506. The microcontroller may use the selected brightness to compute a corresponding CCT for LED module 106 based on the selections shown in the dim-to-warm parameter selector view (shown in FIG. 4).
FIG. 6 shows illustrative curves 600 for a fixture with 1800-3200K CCT capability. Curves 600 may correspond to user-selected CCT partition points and intensity levels from the selector shown in FIGS. 4 and 5. Curves 600 may correspond to direct lighting fixtures. Curves 600 may correspond to indirect lighting fixtures.
FIG. 7 shows illustrative lighting power-CCT correlation scheme 700. CCT scheme 700 may have one or more features in common with one or more of dim-to-warm setting view 400 and user interface view 500. The horizontal axis may represent a total lighting power (LP) for the high CCT LEDs and the low CCT LEDs included in the fixture, the fixture may include one or more features in common with LED module 106. The vertical axis may represent a partitioning P of power between the high CCT LEDs and the low CCT LEDs. The partitioning may range, for example, from delivery of 100% of the lighting power to low CCT LEDs to delivery of 100% of the lighting power to high CCT LEDs. The partitioning may be linear over the range of LP. The partitioning may be non-linear over the range of LP.
