The kitchen was completed almost 12 years ago. It had 10 GU10, 4.5w, 6000k, 240v 50Hz bulbs (LED type) One bulb blew last night. I have swapped over a bulb to ensure the unit/bulb holder is not at fault. To get the same effect, I'm only really seeing 5w, 240v GU10 bulbs. I Question is, can I replace it with a 5w LED? The other problem which I will have to ignore possibly is the design as the present bulbs have grey fins surround, a bit like an aircraft engine fin design, and can see any in any power rating. The present bulbs are by 'Kinghts' fire-rated, very bulky downlights. All help will be gratefully received.