The stomata in plant leaves open according to the leaf temperature, not the ambient air temperature. The leaf temperature is greatly affected by the spectrum of light being used as we demonstrate in our study of leaf surface temperature with different spectra. We do recommend growing and flowering at 85 degrees ambient temperature with our lights, but this does not usually require heating the grow room with anything other than our LED grow lights. While our LEDs do run cool, the light they put off still warms the grow room just as much as a heater of the same wattage-- just like every other light. Normally heating is not required- simply insulating the grow room walls will allow an 85 °F ambient temperature to be maintained without supplemental heating.

The spectrum our lights produce is tailored specifically for photosynthetic efficiency in plants. Coupled with the inherent efficiency of LEDs, this allows our lights to be significantly more efficient than any HID bulb.