Methods and systems for selectively activating led groups

A multi-LED multicolor luminaire for obtaining different desired color light emissions comprising:

• a detection and control circuit;
• a first light emitting diode (LED) Group operable to emit light of a first color and operably connected to the detection and control circuit;
• a second LED Group operable to emit light of a second color and operably connected to the detection and control circuit and wherein the second LED Group is connected in series to the first LED Group;
• and
• a first switch operably connected across the second LED Group;
• wherein the detection and control circuit is operable to:
• detect one of a power sequence or a dimming sequence for controlling the photo-morphology and coloration of plants at specific growth stages;
• and
• in response to detection of the power sequence or to the dimming sequence, operates to at least one of:
• close the first switch to short-out the second LED Group such that no light of the second color is emitted from the second LED Group,
• open the first switch to power the second LED Group to emit light of the second color along with light of the first color from the first LED Group, or
• operate the switch in a manner to alter the light output of at least one of the first LED Group and the second LED Group.