Bulbs

Choose replacement light bulbs and lamps using the fixture’s actual requirements: base or socket type, supply voltage, wattage, light output and available space. Color temperature affects how warm or cool a room appears, while lumens give a more useful indication of brightness than watts alone.

Check whether the fixture is designed for dimming, enclosed-lamp operation or use in damp locations. Not every LED bulb works with every old dimmer or enclosed fitting. Switch off the electrical supply before changing a lamp, and ask a qualified electrician if the fixture or wiring needs attention.