Energizer 4.2W LED Candle Bulb B15 2700K Warm White - Non-Dimmable

The Energizer 4.2W LED candle bulb uses a B15 small bayonet base and produces 470 lumens of 2700K warm white light, replacing a traditional 40W incandescent bulb while consuming just over one-tenth of the power. The candle shape fits chandeliers, wall sconces, decorative table lamps and any fixture originally designed for small bayonet candle bulbs.

Designed for residential use in living rooms, bedrooms, dining rooms and hallways, the bulb operates on standard 230V mains and switches on instantly to full brightness without warm-up delay. The 240-degree beam angle distributes light evenly across the room rather than concentrating it in a narrow cone, making it suitable for ambient lighting rather than directional spotlighting. The non-dimmable design means the bulb delivers consistent output when paired with standard on/off switches.

The 2700K colour temperature sits at the warmer end of the white light spectrum, producing a soft yellow-toned glow similar to traditional tungsten filament bulbs. This makes it comfortable for evening use in spaces where relaxation is the priority. The bulb measures 38mm diameter by 110mm height, which is compact enough for most decorative fittings where the bulb is visible through a shade or exposed as part of the fixture design.

Energizer rates this bulb for a 15-year lifespan based on typical household use of three hours per day, which translates to approximately 16,000 hours of operation. The LED technology runs cooler than incandescent equivalents, reducing heat build-up in enclosed fixtures and minimising the risk of shade discolouration over time.

What does B15 mean?

B15 is the small bayonet cap fitting, 15mm in diameter. It's the smaller of the two UK bayonet standards (the larger being B22). The two pins on the base push and twist to lock into the socket. This size is common in decorative fittings, chandeliers and older table lamps.

Can this bulb be used with a dimmer switch?

No. This is a non-dimmable LED bulb and will not function correctly on a dimmer circuit. Attempting to dim it may cause flickering, buzzing or premature failure. If you need dimmable candle bulbs, search Niori for dimmable LED B15 options.

How bright is 470 lumens?

470 lumens is roughly equivalent to the light output of a traditional 40W incandescent bulb. It provides enough light for ambient or accent purposes in a bedroom, hallway or dining room, but may not be bright enough as the sole light source in a larger space.

What colour is 2700K warm white?

2700K produces a soft yellow-white glow similar to traditional tungsten bulbs. It's warmer and more yellow-toned than daylight (5000K+) or cool white (4000K), making it comfortable for evening use and creating a relaxed atmosphere in living spaces.