How to buy the best light bulb
Find out everything you need to know about classic energy-saving (CFL) light bulbs.
1 October 2020
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 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.
4 June 2021
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.
17 May 2021
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.
27 April 2021
Your energy-saving light bulb concerns
All your energy-saving light bulb concerns answered and myths busted.
1 October 2020