A recent study, conducted over a nine week period, found that replacing water-cooled high-pressure sodium (HPS) systems with energy efficient LED lighting from Philips in a prototype lunar greenhouse resulted in an increased amount of high-quality edible lettuce, while dramatically improving operational efficiency and use of resources. Lettuce grown under Philips LED modules achieved up to 54 grams/kWh of fresh weight, edible lettuce compared to lettuce grown under a high pressure sodium system which achieved only 24 grams/kWh of fresh weight, edible lettuce. This represents an energy savings of 56 percent.Research shows that the replacement of water cooling system with high pressure Sodium (HPS) with LED lighting system saves time and money. Lettuce grown under the Philips LED module achieves up to 54 grams/kWh fresh weight compared to the old system, only 24 grams/kWh energy fresh. More specifically, this impressive system of Philips also helping save up to 56% of the amount of energy
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