Commercial Rebates Back to Ways to Save Commercial Rebates & Incentives Commercial Lighting Rebate Save up to $40,000 with CU rebates for commercial lighting upgrades. Lighting Rebate ENERGY STAR® Smart Thermostat Receive a $75 rebate when you purchase and install an ENERGY STAR® labeled Smart Thermostat. Thermostat Rebate Commercial Lighting Audit Get a free lighting audit, including recommendations for increased efficiency. Lighting Audit WaterSense® High Efficiency Toilet Save up to $75 when you purchase & install a WaterSense® High Efficiency Toilet. Toilet Rebate Ways to Save Residential Rebates Commercial Rebates Efficiency Programs Renewable Energy