When it comes to energy-saving opportunities for businesses, lighting frequently tops the list. Every business needs lights, and energy-efficient varieties \u2013 such as compact fluorescents (CFLs) and T8 fluorescent tube lights \u2013 use 40 percent to 75 percent less energy than their conventional (dare I say \u201cold-fashioned\u201d?) counterparts. Replacing older lights with more efficient alternatives often pays back in less than two years \u2013 far quicker than other, more costly energy upgrades. But there\u2019s another big lighting opportunity on the horizon: Light-emitting diodes, or LEDs.\u00a0 They are getting more affordable, too. Many businesses already use LED-lit exit signs and \u201cOpen\u201d signs because they are cost-effective alternatives to signs with less efficient bulbs. And many large corporations, from Wal-Mart to Starbucks, are starting to invest in LEDs for many different types of fixtures. But most small businesses don\u2019t currently use LEDs in their light fixtures because of the substantial upfront cost. CFL bulbs may cost $2, while an LED light bulb can cost more than $30. However, it's hard to overlook the energy-saving potential: LEDs use less than half the electricity of fluorescent lights and can last more than 30 years. Consider this: One 60-watt incandescent light bulb might cost $12 in electricity a year to operate, while a CFL might cost $3 and a LED might cost $1.50. But once you factor in the upfront cost of the bulbs, it takes far longer to pay off the LED. The real savings comes in the long lifespan of LEDs. Moreover, LEDs tend to have a more pleasing, softer quality of light than fluorescents and don't contain mercury. The economics of LEDs is getting brighter every day, and there\u2019s reason to start considering them. The New York Times recently reported that the price of certain LED light bulbs had fallen below $20 at Home Depot \u2013 several years before forecasters ever thought they\u2019d get so affordable. When the price starts getting below $10 or $15, it may be time to buy. Moreover, there\u2019s already some financial help for businesses interested in installing LEDs. Some state programs and utility companies have introduced rebates for businesses that install LEDs, greatly reducing the price. Efficiency Vermont, an energy-efficiency advocacy program, offers $30 rebates for businesses that install Energy Star-qualified screw-in\u00a0 and pin-based LEDs and $150 for businesses that put in LED directional track lighting. That goes a long way toward helping cover the big upfront cost. It might be worth seeing what incentives for LEDs are available to your business.