Energy saving lamps are sources of artificial light that employ advanced technology to reduce the amount of electricity used to generate light, relative to traditional filament-burning light bulbs. Examples of energy saving lamps include: Fluorescent lamps; i.e. regular and compact. a Light-emitting diode bulb. Energy saving light bulbs last up to 12 times as long as traditional bulbs, using less electricity to emit the same amount of light as a traditional bulb. They're an energy-efficient option, helping you to reduce the carbon footprint of your home.
To find a new more efficient bulb with that amount of light you should look for lumens not watts. Watts are simply a measure of energy is used, the amount of electricity a bulb needs to operate. The light output or brightness of the bulb is actually measured in lumens. More lumens, mean more light. The Department for the Environment insists the bulbs are safe, despite the fact that they contain small amounts of mercury which would leak out if the glass was broken.
The most popular light bulbs available are halogen incandescents, compact fluorescent lamps (CFLs), and light-emitting diodes (LEDs). Although they can initially cost more than traditional incandescent bulbs, during their lifetime they save you money, because they use less energy.