Traditional light fittings have a maximum wattage, so when buying halogen or incandescent bulbs you’ll have to check the wattage of your bulb. Although, with the introduction of LED’s which have such a low wattage its rare you’ll exceed the maximum. LED bulbs should say what the equivalent in incandescent wattage is on the box, although if they don’t here’s a helpful guide.
2-3w LED = 25-30w Incandescent
4-6w LED = 40-60w Incandescent
8-10w LED = 60-100w Incandescent
10-13w LED = 100-150w Incandescent