E27 (ES) LED GLS Bulb 12.6W 1521lm Dimmable - Daylight 6500K

This is a full size GLS bulb, the familiar rounded household shape, with an E27 screw cap and an LED source rated at 12.6W. It puts out 1521 lumens, and the pack sets that against a 100W replacement, so it sits at the bright end of what a single lamp will give you in an ordinary pendant. The colour temperature is 6500K, printed on the pack as daylight: a cool, crisp white with no yellow in it at all. The bulb is finished in white rather than clear glass, so the source is diffused rather than on show.

Daylight white is a working light rather than a relaxing one. It reads as bright and slightly blue next to warm white, which makes it a sensible choice for a kitchen ceiling, a utility room, a garage or workshop pendant, a home office, or a craft table where you need to judge colour accurately. Mixing daylight with warm white in the same room looks mismatched, so it is better to change a whole room at once. An E27 cap is the larger of the two screw fittings in common UK use, measuring 27mm across the thread, so check the old bulb is not the narrower E14.

Dimming is supported, and the pack carries a dimmable marking. Dimmable LED lamps need a dimmer rated for LED loads, because older rotary dimmers were built for filament bulbs and can hum or flicker on a low wattage load. The energy rating is E, and the pack states a 15 year lifespan. Each box holds one bulb, and the minimum order is 12, sold in multiples of 12, which makes it a sensible way to do a run of fittings in one go.

Will this fit my lamp holder?

It takes an E27 screw holder, the larger of the two screw caps used in the UK at 27mm across the thread. Check the old bulb screws in rather than pushing and twisting, and that it is not the narrower E14.

How bright is 1521 lumens in real terms?

The pack rates it as a 100W replacement, so it is a bright general purpose lamp. In a single pendant it will comfortably light a kitchen, a utility room or a small workshop on its own.

What does 6500K daylight actually look like?

It is the coolest of the standard whites, crisp and slightly blue, with none of the yellow cast of a 2700K warm white bulb. Good for seeing detail and judging colour, less suited to evening relaxing.

Can I use it on a dimmer switch?

Yes, the specification and the pack both mark it as dimmable. Use a dimmer rated for LED loads, as older dimmers built for filament bulbs can hum or flicker on a low wattage lamp.

How many bulbs do I receive?

Each box contains one bulb. The minimum order on this listing is 12 boxes, sold in multiples of 12, so it works best when you are replacing several fittings at once.