From a news release issued by Focus on Energy:

(Nov. 16, 2009) – LED (light emitting diode) holiday lights are a proven way to help consumers trim energy costs while trimming their trees. How? This technology saves energy, while helping to preserve the environment. What’s more, Focus on Energy, Wisconsin’s statewide energy efficiency and renewable energy resource, is offering financial incentives toward the purchase of ENERGY STAR® qualified LED holiday light strings.

Now through Dec. 31, 2009, or until supplies last, Focus on Energy is offering a $3Instant Reward, taken at the register, on the purchase of ENERGY STAR qualified LED holiday light strings at participating locations including Ace Hardware, Costco, Do it Best, Hardware Hank, Menards, Mills Fleet Farm, Shopko, Stein Gardens & Gifts and True Value Hardware locations. Limit twelve (12) light sets per customer.