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Light bulbs advice guides

8 articles

LED light bulbs reviewed by Which? Find out how bulbs from brands including Ikea, GE Osram and Philips fared in our rigorous tests.

How to buy the best light bulb

By Haddi Browne

Find out everything you need to know about classic energy-saving (CFL) light bulbs.

CFL light bulbs explained LED lights explained Halogen light bulbs explained

1 October 2020

Five tips for choosing the right light bulb

By Haddi Browne

Before you buy a new light bulb, read our top tips to avoid a costly mistake.

1 October 2020

How to buy the best spotlights

By Haddi Browne

LED vs halogen, beam angles, lumens – we explain everything you need to know before you buy a new spotlight.

1 October 2020

Your energy-saving light bulb concerns

By Haddi Browne

All your energy-saving light bulb concerns answered and myths busted.

1 October 2020

Light bulb FAQs

By Haddi Browne

Find out the answers to the most commonly asked light bulb questions.

1 October 2020

How to fix common LED problems

By Haddi Browne

Expert advice on how to stop your LED lights flickering, buzzing or burning out, plus what you need to know about dimming LEDs.

1 October 2020

How we test energy saving light bulbs

By Haddi Browne

No one tests light bulbs as thoroughly as Which?. Read on to find out about our extensive light bulb testing.

5 October 2020

Smart light bulbs

By Haddi Browne

Our testing reveals the intuitive app-controlled smart light bulbs that are worth your money, and the ones you should leave well alone.

Top smart light bulbs for 2020 How to buy the best smart light bulb Philips Hue vs other smart lighting systems

1 October 2020