Cultivation and horticultural lamps, lighting fixtures, and structural parts thereof; Light Emitting Diode (LED) lights, lighting fixtures, and LED light engines adapted for horticultural growing purposes; Light Emitting Diode (LED) lighting systems comprised of lighting fixtures for use in horticulture, cultivation, and agriculture; Electric lighting fixtures and electric lamps for horticultural growing purposes; Light Emitting Diode (LED) lighting fixtures for indoor and outdoor lighting applications