Jiénéngdēng bǐ LED guì bùliǎo duōshao, dàn gèng fèi diàn.
CFLs aren't much cheaper than LEDs, but they use more electricity.
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节能灯 originally referred to spiral CFL bulbs that replaced incandescents. As LEDs took over, the term often gets used loosely for any low-watt bulb — but strictly, today's LED bulbs are LED灯 (LED dēng).
