Green Light National was responsible for cutting Polyair’s Lighting Energy usage by over 50%.” Annual Energy Savings: 156,394kWh for $14,400.00 Payback: 11 months and ROI of 90% Acquired a $12,000 rebate Increased light levels by an average of 25% across entire facility The reduction in energy consumption is equivalent to removing 23 cars from the road each year, or planting 28 acres of trees.