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Greenhouse LED lighting study results:

"US (MN): "43% energy savings under LEDs compared to HPS"

Two groups, Outsourced Innovations, a lighting consulting firm, and Tangletown Gardens, a greenhouse nursery and garden business, recently finished a one-year study. The research project, called LED Lighting to Improve Energy Efficiency in Controlled Environment Agriculture, aimed to show reductions in energy use from greenhouse-specific LED lamps compared to the traditional use of high pressure sodium (HPS) lamps in a controlled crop environment.

The key findings of the research are as follows:

Substantial energy savings (43%) was measured under LEDs compared to HPS.
Lumigrow LEDs fixtures were reliable and performed better than stated on energy consumption and power quality in this real-world application
LED equipment payback was projected to occur in 2.2 years
Moving crops closer to the LED light source produced intriguing outcomes in controlled environment agriculture.

In the video below, it is shown and explained how the research has been conducted.