B15 (SBC) LED Golf Bulb 4.9W 470lm - Warm White 3000K

A golf bulb is the small round bulb, a little larger than a golf ball, that suits bedside lamps, wall lights and compact pendants where a full size bulb looks heavy. This one draws 4.9W and gives 470 lumens, which the pack rates as the equal of a conventional 40W bulb. It fits a B15 small bayonet cap, so it pushes in and turns a quarter of the way rather than screwing home, and the white diffuser spreads the light across the whole dome instead of leaving the diodes visible. The pack gives the bulb as 45mm across and 74mm long.

The colour temperature is 3,000K, a warm white that reads slightly softer than daylight and sits comfortably in living rooms, bedrooms and hallways; it is the tone most people recognise from an old incandescent lamp. The beam angle is 240 degrees, so light leaves the bulb in almost every direction rather than in a forward cone, which matters in an open shade, a clear glass fitting or a multi arm chandelier where the bulb itself is on show. The pack also quotes a colour rendering index above 80, meaning fabrics and paint colours keep their character under it. If you are matching bulbs across one room, note that the same 470 lumen output is also stocked in a daylight 6500K version.

This bulb is not dimmable, so give it a plain on and off switch; a non-dimmable LED left on a dimmer circuit can flicker, buzz or refuse to start. The pack prints a 10 year lamp life at 10,000 hours and more than 10,000 on and off cycles, which suits a hall or landing light that gets switched often, and the energy label rates it F at 5kWh per 1,000 hours. Each unit is a single boxed bulb, and the minimum order is five, sold in multiples of five.

What does B15 mean, and how do I check my lamp takes one?

B15 is the small bayonet cap: two side pins on a 15mm metal collar that push in and twist a quarter turn. Pull your old bulb out and measure the collar, since 15mm is B15 and 22mm is the larger B22.

Is 470 lumens genuinely the same as a 40W bulb?

The pack rates the 470 lumen output as the equal of a conventional 40W bulb, so expect similar brightness in a bedside lamp or hall fitting while drawing only 4.9W.

Can I use it with a dimmer switch?

No. The specification gives it as non-dimmable, so it needs a plain on and off switch. A non-dimmable LED on a dimmer circuit can flicker, buzz or fail to start at all.

What does warm white 3,000K actually look like?

It is a soft, slightly yellow white, close to the tone of an old pearl incandescent lamp, and it flatters wood, warm paint colours and skin tones in a living room or bedroom.

Will it fit inside a small shade or a glass globe?

The pack gives the bulb as 45mm across and 74mm long, which is the standard golf size, so measure the inside of the shade or globe and allow a few millimetres of clearance.

How many bulbs do I receive, and can I buy a single one?

One unit is a single boxed bulb. The minimum order on this listing is five units, sold in multiples of five, so the smallest purchase is five bulbs.