A top reason that indoor Christmas tree lights malfunction is an overloaded electrical circuit. Discard damaged bulbs promptly and replace them in order to extend the life of Christmas lights. Give ...

We independently review everything we recommend. We may get paid to link out to retailer sites, and when you buy through our links, we may earn a commission. Learn more› By Thom Dunn Thom Dunn is a ...

All it takes is one bad bulb to keep all of the other Christmas lights from lighting up. The trouble is, how do you find that one bad bulb? This gadget is supposed to help you find it. A bad bulb ...

Sam – an ex-science teacher – uses his physics degree and five years of experience at Which? to test everything from beard trimmers to electric bikes and trampolines. Whether you stick to one string ...