Controlled Environment Agriculture

Supplemental Lighting

High Pressure Sodium Lighting Analysis

Our research into supplemental lighting has spanned nearly 25 years. We have demonstrated the importance of reflector design and luminare placement.

Light Emitting Diodes, LED's

Light emitting diodes or LED's are gaining exposure as a supplemental plant lighting category. We have examined the efficiency (and efficacy) of these luminares and explain when this technology should and should not be applied to plant growth facilities.

View seminar video: Chlorophyll fluorescence as a tool for biofeedback control of photosynthetic lighting

Daily Light Integral

Much basic research into the response of lettuce to varying daily light integrals allowed the creation of growth curves for lettuce and eventually to a computer control algorithm called LASSI (Light and Shade System Implementation). LASSI ensures that a crop will receive a target daily light integral by activating a moveable shade or turning on supplemental lighting. Targeting a uniform daily light integral creates a consistent crop yield every day and allows for predictible labor requirements and product volume.

Cycloptics HID Chamber and Research Greenhouse Lighting

Cornell CEA researchers have been testing the light output and distribution pattern of HID luminares that have novel reflectors that facilitate the exit of useful light energy in less 'bounces' than typical for HID reflectors. The result is less energy lost from the reflector as well as a more uniform pattern of PAR distribution over the plant growing area. Cycloptics has created two different luminare