0Although fluorescent lamps initially cost more, they use less energy and last longer. Therefore, energy costs, and labor costs for lamp replacement are reduced. Fluorescent Facts Buying fluorescents in volume offers even greater savings. Fluorescents can reduce your cooling costs, since they emit less heat. Screw-in fluorescents, which are somewhat larger than incandescents, come in a variety of sizes and shapes including globe, tube, and circle styles.
Some fluorescents are heavier than traditional bulbs because they require a ballast.
Measure a fixture before buying compact fluorescent bulbs. Fluorescents are larger and don't always fit traditional fixtures. Harp adapters can often remedy this problem. Fluorescent lamps cannot be dimmed and are not recommended for operation in freezers or outdoor settings because of sensitivity to low temperatures.