Final answer:
LED bulbs are expected to play a greater role in future years due to their high efficiency, long lifespan, and energy-saving advantages despite the higher initial cost.
Step-by-step explanation:
The kind of lamp that is most expected to play a greater role in the coming years involves light-emitting diodes (LEDs). LEDs are significantly more efficient than both compact fluorescent lamps (CFLs) and incandescent bulbs. LED bulbs emit light by manipulating energy levels of electrons within semiconductors, and they are designed for the visible spectrum. Compared to incandescent and CFL bulbs, LEDs offer a higher luminous flux for a given amount of electrical power, which results in greater energy savings. They not only consume less energy but also have a longer lifespan. The advancements in LED technology have made these bulbs a smart choice for reducing environmental impact and cutting down on costs, despite their initial higher purchase price.