Eveready 4.9W LED Golf Ball Bulb B15 - Warm White 3000K Non-Dimmable

The Eveready 4.9W LED golf ball bulb fits B15 small bayonet cap fittings and produces 470 lumens of warm white 3000K light, equivalent to a traditional 40W incandescent bulb. The compact golf ball shape measures 45mm diameter by 78mm height, making it suitable for decorative table lamps, wall sconces, chandeliers and enclosed ceiling fittings where a small bulb form is needed.

Designed as a direct replacement for 40W incandescent golf ball bulbs in residential and hospitality settings, the 240° beam angle provides wide light distribution without the need for reflector shaping. The bulb is non-dimmable and delivers consistent brightness across its 10,000 hour rated lifespan, reducing the frequency of replacement compared to halogen or incandescent alternatives. The B15 small bayonet cap is less common than the standard B22 but widely used in older British light fittings, particularly decorative table lamps and traditional wall lights.

The 3000K warm white colour temperature sits between the yellower tone of 2700K filament bulbs and the cooler 4000K daylight LEDs, providing ambient light that complements warm-toned interiors without the orange cast of older bulb technologies. The energy rating of F reflects the current EU energy labelling system introduced in 2021, where most LED bulbs now fall into classes D-G due to revised efficiency thresholds. At 4.9W the bulb consumes approximately 88% less energy than the 40W incandescent it replaces.

The bulb contains no mercury and switches on instantly to full brightness without warm-up time. The frosted opal glass diffuser hides the internal LED array and provides even light distribution without visible hotspots or striping.

What is a B15 bulb cap and where is it used?

B15 is a small bayonet cap measuring 15mm diameter, smaller than the standard B22 bayonet. It's commonly found in older British decorative table lamps, traditional wall lights, some chandeliers and vintage-style fittings. Check your existing bulb base before ordering — B15 and B22 are not interchangeable.

Is this bulb dimmable?

No. This bulb is non-dimmable and will not work with dimmer switches. Installing a non-dimmable LED on a dimmer circuit can cause flickering, buzzing or premature failure. If you need dimmable B15 golf ball bulbs, search for dimmable variants on the Niori site.

How bright is 470 lumens?

470 lumens is equivalent to a traditional 40W incandescent bulb. This provides adequate ambient light for bedside table lamps, decorative wall sconces and small enclosed ceiling fittings, but is not bright enough for task lighting or primary room illumination in larger spaces.

What does the F energy rating mean?

The F rating reflects the EU energy labelling system revised in 2021, where efficiency thresholds were tightened and most LED bulbs now fall into classes D-G. An F-rated LED still uses approximately 88% less energy than the 40W incandescent it replaces, so it remains an energy-efficient choice compared to older bulb technologies.