"When a GU10 blows it can really blow. I've been looking for a product that at the very least would last longer than the first switch on. Even branded bulbs rarely achieve the stated life hours. But in true Sylvania style, these GU10s seem to be doing the business. After looking around with specialist lamp suppliers for a good price, I came back to Screwfix. Although maybe not the first place to think of for replacement bulbs, they have once again done the business, and quick too."