To identify the right replacement part for your light fixture, first, turn off the power to the fixture at the circuit breaker. Then, carefully inspect the existing part you need to replace. Look for any labels, model numbers, or specifications printed directly on the part or the fixture itself. Common parts include bulbs, sockets, shades, and ballasts.
For bulbs, check the wattage, base type (e.g., E26, GU10), and color temperature. If it's an LED, note if it's dimmable. For sockets, identify the type (e.g., candelabra, medium base) and any associated wiring. When replacing shades, measure the dimensions (diameter, height, opening size) and note the type of mounting mechanism (e.g., clip-on, screw-on). Ballasts often have specific voltage and wattage requirements; match these exactly.
If you can't find a model number, take clear photos of the part and the fixture from multiple angles. Measure the part's dimensions accurately. You can then use this information to search online retailers, visit specialty lighting stores, or consult with a lighting professional. Many manufacturers also have replacement parts sections on their websites where you can search by fixture model number. Bringing the old part to a store can also help staff identify a suitable replacement.