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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

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

Five tips for choosing the right light bulb

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

Smart light bulbs

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

How to buy the best spotlights

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

Your energy-saving light bulb concerns

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

Light bulb FAQs

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

How to fix common LED problems

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

How we test energy saving light bulbs

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