Feit Electric’s Performance LED lamps come in many sizes and require only 10 percent of the energy needed by comparable incandescents, says the maker. They have an expected life of 30,000 hours and achieve full brightness immediately. The 16-watt PAR 38 lamp shown — a common size for can lights — puts out 710 lumens and is intended to replace a 75-watt incandescent bulb. It costs about $60. Feit Electric, 800/ 543-3348, feit.com.