Energizer LED GLS Bulb E27 9.5W Opal Non-Dimmable - Daylight 6500K

This is a 9.5W LED GLS bulb with an E27 screw cap, the rounded pear shape that most UK table lamps, pendants and standard lamps were built around. It gives 1,050 lumens, and the retail pack rates it as a replacement for a 75W incandescent bulb, so it is one of the brighter options in the GLS size rather than a general purpose middle wattage. It runs at 6,500K, which is daylight white: a crisp, cool light with no warm cast at all, sitting at the opposite end of the scale from the 2,700K warm white used in most sitting rooms. The opal white finish diffuses the light rather than letting you look straight at the diodes.

Daylight at this brightness suits rooms where you want to see detail clearly rather than settle in for the evening. Home offices, kitchens, workshops, garages, utility rooms, hobby corners and task reading lamps all take it well, and it is a common choice for craft work or for anyone matching colours, because a high colour temperature keeps whites reading as white rather than yellowed. The 240 degree beam angle throws light almost all the way around the bulb, so it works under a shade or in a pendant where a narrow beam would leave the ceiling dark. One thing worth planning: keep the colour temperature consistent within a single room, as a 6,500K bulb beside a 2,700K one looks obviously mismatched.

There is no dimming here. The specification lists it as non-dimmable and the pack carries the non-dimmable icon, so put it on a plain on and off switch rather than a dimmer circuit, where it may flicker, buzz or fail early. The pack prints a 15 year lifespan based on 15,000 hours of use, and the bulb carries energy rating E. Its IP20 rating means ordinary dry indoor use. Each box holds one bulb, with a minimum order of 12, sold in multiples of 12. It sits within our wider range of LED bulbs from the same maker, which includes B15 candle bulbs and GU10 spotlights.

How do I know if my lamp takes an E27 bulb?

E27 is the larger screw cap, also written as ES. Take the old bulb out and look at the base: if it has a spiral thread roughly the width of a two pence coin, it is E27. The smaller screw cap, E14 or SES, will not fit.

How bright is 1,050 lumens in practice?

Lumens measure light output, and 1,050 is a good deal brighter than the 806 lumens most people are used to from a standard replacement. The pack rates it against a 75W incandescent bulb, so expect a well lit room from a single central pendant in a small to medium space.

What does 6,500K daylight look like compared with warm white?

It is a clean, cool white with a slight blue lean, close to overcast daylight. Warm white at 2,700K looks yellow and restful by comparison. Choose 6,500K where you want clarity for working, reading detail or judging colour accurately.

Can I put this on a dimmer switch?

No. Both the specification and the pack say non-dimmable, so it should go on a standard switch. Fitted to a dimmer circuit an LED bulb of this type may flicker, hum or shorten its own life.

How many bulbs do I get, and how many must I order?

Each box contains one bulb. The minimum order on this listing is 12 units, sold in multiples of 12, so a single order brings you twelve individually boxed bulbs.

Will it work in an enclosed shade or a fully closed fitting?

The manufacturer does not state whether it is suitable for enclosed fittings, so we cannot say either way. An open shade or pendant lets air move around the base, which is the safer choice for any LED bulb.