Visit ShopIPL.org. Interfaith Power & Light is partnering with Energy Federation Incorporated (EFI) to offer high-quality, affordable energy-efficient products. Many products are offered with quantity discounts, allowing participating congregations to easily order products at competitive wholesale prices. In addition, congregations and their members can get 10% off all prices by entering a special promotion code “shopipl”. A portion of your purchase will support your state’s Interfaith Power & Light organization.