No, part of the efficiency of CFLs and energy savers is not having the majority of energy lost to heat. The bulbs get hot, but not like incandescents. From energy plant to your incandescent bulb, it is only 2-3% efficient as a light source because most of the energy is lost through heat transfer. CLFs use 50-80% less energy than incandescents.
Nope — therein lies their energy efficiency.
Energy saving bulbs – or Compact Fluorescent Lamps (CFLs) change electrical energy into light in a different way than incandescent light bulbs. Instead of passing current through a filament which then heats up and glows, literally white-hot (hence ‘incandescent’) the CFL sends electricity through a cloud of gas inside the glass. This gas gives out ultra-violet light and turns into visible light when it passes through the special coating on the inside of the bulb. This wastes far less energy as heat – providing the same amount of illumination for around 20 per cent of the electricity used by a conventional bulb.
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