What are the most efficient light bulbs I can get and how much energy and cost do they save me?

What are the most efficient light bulbs I can get and how much energy and cost do they save me?

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Energy efficient lights are compact fluorescent lamps CFL or light emitting diodes LED. An LED lights uses a huge 90% less energy than an old-style lightbulb.

Mrs Mummypenny

Ned Al-Astrabadi

It was surprisingly simple to switch to a new energy deal and I saved about £230.

Buckhurst Hill