Final answer:
A fluorescent lamp, especially a compact fluorescent lamp (CFL), is more energy-efficient than an incandescent lamp. Fluorescent lamps use less power for the same light output, have lower heat transfer, and last much longer, thus providing both cost savings and environmental benefits over incandescent lamps.
Step-by-step explanation:
When considering energy efficiency in light sources, a fluorescent lamp, specifically a compact fluorescent lamp (CFL), is significantly more energy-efficient than an incandescent lamp. The luminous flux, measured in lumens, is a crucial factor when comparing different types of light bulbs. Energy-efficient bulbs provide more luminous flux per unit of electricity used. For example, a 60-W incandescent bulb can be replaced with a 15-W CFL that provides the same intensity and color of light. Fluorescent lamps, including CFLs, are known to be approximately four times more efficient than incandescent lamps.
This higher efficiency translates into reduced power consumption, which not only lowers energy costs but also minimizes the environmental impact. Furthermore, the heat transfer from CFLs is less compared to incandescent bulbs, and they can last up to 10 times longer. Although upfront costs may be higher, the investment in CFL bulbs is significant in the long term. In terms of energy efficiency and environmental impact, fluorescent lamps are the superior choice over incandescent lamps.