E27 GLS 4.5W Filament Opal LED Bulb 40W-eq 320° 470lm - Warm White

This E27 LED bulb takes the classic A60 GLS form, the rounded household shape that drops straight into any standard pendant, lamp or batten holder with an Edison Screw fitting. Stateside this is the A19 with a medium screw base, so it is a familiar size on either side of the Atlantic. It draws just 4.5W yet gives 470 lumens, replacing a 40W old bulb at a fraction of the running cost. The 2700K warm white tone is soft and amber-leaning, and the wide 320 degree beam spreads light evenly around the room rather than throwing it in one direction.

Inside the clear glass sit visible LED filaments that recreate the vintage incandescent look, with an opal finish softening the glow for a gentler effect. That makes it well suited to exposed pendants over a dining table, open-shade table and floor lamps, hallway fittings and any spot where the bulb itself is on show. The warm 2700K colour and Ra 80 rendering keep skin tones and timber surfaces looking natural, so it works comfortably in living rooms, bedrooms and snugs. Coverage is broad and ambient thanks to the near-omnidirectional 320 degree spread, making it a general-purpose lamp rather than a focused task light.

The bulb measures 60mm in diameter and 105mm long and weighs only 30g, so it sits neatly in compact shades. It runs on 220 to 240V AC mains and is IP20 rated for dry indoor use only, so keep it clear of bathrooms, porches and any outdoor or damp location. It is non-dimmable, so pair it with a standard on or off switch rather than a dimmer circuit. Rated for 15,000 hours at an efficiency of 104 lm/W, it is a long-life, low-energy choice. We stock this bulb across several caps and shapes in the same filament range.

Product Specification Sheet

Range Datasheet

Which fitting do I need for this bulb?

It has an E27 Edison Screw (ES) cap, the larger screw-in base used on most standard pendants, table lamps and ceiling fittings. In the US this is the medium screw base. Simply screw it in clockwise until snug.

What old bulb wattage does it replace?

It draws just 4.5W but gives 470 lumens, equivalent to a 40W traditional incandescent bulb. You get the same brightness for a fraction of the energy use, which lowers running costs over the bulb's 15,000 hour rated life.

Is this bulb dimmable?

No, this is a non-dimmable bulb, so use it on a standard on or off switch rather than a dimmer circuit. Fitting it to a dimmer may cause flicker or shorten its life.

What does the warm white filament look like when lit?

It gives a soft 2700K warm white glow with a slight amber warmth, and the visible LED filaments inside the clear glass recreate a vintage incandescent look. The opal finish softens the output for a gentler, even spread, ideal where the bulb is on show in an exposed fitting.