LED bulbs: E27, E14, G9, GU10 | Designix
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- Advice & showroom in Lyon, France
Start with the base, then pick the light temperature. An E27 or E14 screws in, a G9 or G4 pushes in, a GU10 fits a spotlight: once the base is identified, wattage and white tone follow from the room and the use.
What are the different bulb bases: E27, E14, G9, G4 and GU10?
The base is the thread or the pin that links the bulb to the fixture. E27 is the large screw base, E14 the small one. G9 and G4 are pin bases for small modules, and GU10 is a two-pin base used by adjustable spotlights.
E27 bulbs: the large screw base
This is the most widespread base: it fits a pendant, a ceiling light, a floor lamp or a standing lamp. Its size leaves room for ball, tube and globe shapes, and for clear, smoked or amber glass. Find these models among the E27 base bulbs.
E14, G9 and GU10 bulbs: the small bases
E14 is the same thread in a slimmer size, for wall lights and small accent lamps, gathered in the small E14 bulbs. G4 and G9 are pin modules, whose smallest side measures between 1.5 and 1.8 cm: the G4 and G9 bases cover these formats. GU10, with two thick pins, fits spotlights.
| Base | How to recognise it | Common format | Fixtures concerned |
|---|---|---|---|
| E27 | Large thread | Ball, tube, globe | Pendant, ceiling light, standing lamp |
| E14 | Small thread | Ball, fine filament | Wall light, small accent lamp |
| G9 | Two fine pins | Module of 1.5 to 1.8 cm | Small ceiling light, compact fixture |
| G4 | Two very fine pins | Miniature module | Low-profile fixture |
| GU10 | Two thick pins | Spotlight | Adjustable spotlight and track |
| GX53 | Flat base | Flat module of 7.3 cm | Flat fixture |
What are the 4 types of bulbs and how do you recognise them?
In this selection, bulbs are told apart by their base: large screw base E27, small screw base E14, pin bases G9 and G4, and GU10 two-pin base for spotlights. Shape and material then vary: ball, tube, round or globe, in glass or metal.
How do you tell a screw base from a pin base?
A screw base has a cylindrical thread: it unscrews. A pin base is recognised by its two metal pins set into a ceramic or plastic body, which push into the socket with a quarter turn or a simple press. The GX53 is entirely flat, with no thread and no pin.
Why check the base before buying a bulb?
A base that does not match makes the fixture unusable, and a bulb that is too wide will not fit under the shade. Compare the base of the burnt-out bulb with that of the fixture, then look at the space available. To widen your search by product family, browse the full range of LED bulbs and all of our light fixtures.
Which bulbs give the most light?
These are the most powerful models in the selection: the GU10 12 W bulb for spotlights, the E27 7 W bulb and the G9 4000K 4.5 W bulb rated at 460 lumens. At the same base, wattage and luminous flux make the difference, not the size of the bulb.
Wattage and luminous flux: what really changes
Power drawn shows how much electricity the bulb uses, luminous flux in lumens shows what it gives back. An E27 7W bulb in warm white is enough for a living room or a hallway, while an adjustable spotlight needs more power to reach the worktop. Wattages in the selection run from 3 W to 12 W.
Warm white, neutral white or cool white: which effect?
Warm white, around 2700 to 3500 K, gives a restful light that slightly yellows whites. Neutral white, around 3500 to 4500 K, keeps colours faithful, which helps in a kitchen. Cool white, beyond that, stays reserved for technical rooms. Warm white bulbs dominate here, ahead of 3000K bulbs.
| Temperature | Effect | Rooms and uses |
|---|---|---|
| Warm white (2700 to 3500 K) | Warm, restful light | Bedroom, living room, reading corner |
| Neutral white (3500 to 4500 K) | Crisp light, faithful colours | Kitchen, dining room, hallway, office |
| Cool white (4500 to 6500 K) | Very white light | Workspaces and technical rooms |
What are the drawbacks of LED bulbs?
An LED gives off little heat and uses less than a classic bulb, but it is not always repairable: compact modules are replaced whole. Every bulb in this selection is IP20, so kept away from water splashes, and only some accept a dimmer.
Dimmer compatibility: what to check
A non-dimmable bulb wired to a dimmer flickers or hums. The dimmer-compatible references let you lower the intensity in the evening without changing the fixture.
Integrated LED modules: what gets replaced
When the diode is soldered to the module, the whole bulb goes at the end of its life, with no repair possible. A filament model, whose diode imitates a classic bulb, is replaced in the same way.
How do you choose a bulb for each room?
The bedroom and living room call for warm light, around 2700 to 3500 K, often in an E27 base or with a visible filament. The kitchen and dining room benefit from a neutral white that renders colours more clearly. In a bathroom, IP20 means staying out of wet zones.
Bulbs for the bedroom and living room
In these rooms, light sits low and is adjusted. A filament bulb in a pendant or a lamp without a shade becomes a visible part of the decor. Bedroom bulbs rely on warm white, and those for living room lighting are also chosen for their shape.
Bulbs for the kitchen and bathroom
In the kitchen, a GU10 spotlight in neutral white aimed at the worktop avoids cast shadows. In the bathroom, the IP20 rating of the whole selection allows no water splash: keep the bulb out of the shower and bath volume. A G9 module at 4000 K suits a mirror wall light well, provided the socket stays away from water.
E27 LED bulbs: how do you choose the right one?
The E27 base is the most widespread in the selection: it comes in a filament version, in clear, smoked or amber glass, in white or gold, with or without a dimmer. The ball or globe shape shows in a pendant, the tube shape in a linear fixture.
E27 filament bulbs: when to show them, when to forget them
The filament shows when the bulb stays visible: pendant without a shade, wall light, open lamp. It is forgotten behind an opaque shade, where a discreet module costs less. Bulbs with a visible filament and glass bulbs cover this decorative register. The Spirala in smoked glass is one example, with its spiral filament in an E27 base.
E27 dimmable bulbs: adjusting the intensity
On a standing lamp or a living room pendant, a dimmer changes the mood in one gesture. Check the dimmable mention on the product page before buying, then the minimum wattage accepted by the fixture's dimmer. E27 dimmable LED bulbs meet this need.
G9 and GU10 bulbs: for which fixtures?
G9 bulbs are small pin modules for compact fixtures, wall lights and small ceiling lights. GU10 fit adjustable spotlights and tracks, with a beam aimed at a worktop or a wall. Both come in warm white and neutral white.
G9 bulbs: small fixtures and compact modules
A G9 module measures about 1.5 to 1.8 cm across and 5 cm high: it fits where an E27 will not, in a slim wall light or a low ceiling light. The G9 4.5W module covers bedroom, living room, kitchen and hallway, in warm white or neutral white.
GU10 bulbs: spotlights and directed lighting
The GU10 throws light in a tight cone: it is the base of kitchen, display and adjustable track spotlights. A GU10 7W spotlight is enough to light a worktop; the 12 W version lights further and brighter, for a high ceiling or a wall to highlight.
Connected, rechargeable or dimmable bulb: which to choose?
A connected bulb is controlled from a phone and a rechargeable bulb works without a plug, but this selection is adjusted differently: some models accept a dimmer, on a fixture supplied at 220V. Intensity is then set from the fixture's dimmer.
Controlling your lighting with a dimmer
The dimmer acts on the fixture's circuit, not on the bulb alone: you therefore need a compatible fixture and a dimmable bulb. Bulbs running at 220V cover most domestic installations. For a low-voltage fixture, look instead at 12V LED bulbs, which are not controlled in the same way.
Bulbs for a standing lamp
A standing lamp usually accepts a large E27 base. A filament bulb in warm white gives a soft light for reading or relaxing, a neutral white model lights a desk corner more sharply. Measure the height available under the shade before choosing a shape, the ball and the globe do not take up the same space.
Which bulb shape to choose: ball, tube, globe or oval?
The ball shape, the most common in the selection, stands out in a pendant or a lamp without a shade. The tube shape dresses linear fixtures, the round shape ceiling lights, and the globe or oval suit open fixtures, in clear, smoked or amber glass.
Ball and globe: for open fixtures
A visible bulb has to play its decorative role: clear, smoked or amber-tinted glass completely changes how the light looks. Retro bulbs and amber-tinted bulbs warm up a wood and brass interior, while white-tinted bulbs stay more discreet on a pale wall.
Tube and oval: for linear fixtures
The tube shape slips into a rail or a long fixture, where the bulb lines up its light instead of spreading it in every direction. The oval and the round suit ceiling lights and wall lights. For a contemporary interior, modern bulbs with clean lines match better than a twisted filament.
| Shape | Most common materials | Where it stands out |
|---|---|---|
| Ball | Glass, glass and brass | Pendant, lamp without a shade |
| Round | Glass, metal | Ceiling light, wall light |
| Tube | Glass, metal | Linear fixture, rail |
| Oval | Glass | Open fixture |
| Globe | Glass, glass and metal | Open pendant, visible lamp |
Frequently asked questions about bulbs
What are the 4 types of bulbs?
There are bulbs with a large screw base E27, a small screw base E14, a pin base G9 or G4, and a GU10 base used by spotlights. In this selection, all are LED, in glass or metal, and all carry an IP20 protection rating.
Which bulbs give the most light?
The most powerful models in the selection are the GU10 12 W bulb for spotlights, the E27 7 W bulb and the G9 4000K 4.5 W bulb rated at 460 lumens. Brightness depends on wattage and luminous flux, not on the size of the bulb.
What are the drawbacks of LED bulbs?
An LED gives off little heat, but some compact modules cannot be repaired: when the diode is integrated, the bulb is replaced whole. Another point to check is the dimmer, since not every reference is dimmable, and all of these are IP20, with no protection against water splashes.
Which E27 bulbs should you choose for a pendant?
For a pendant, an E27 filament bulb in clear, smoked or amber glass lets the source show and dresses the fixture. Choose a ball or globe shape if the shade is open, and check that the model accepts a dimmer if the switch is graduated.
Which GU10 bulb should you choose for a kitchen spotlight?
A GU10 spotlight is used to aim light at a worktop: favour a neutral white around 4000 K to keep colours clear. The selection offers a GU10 7 W and a GU10 12 W, brighter, both available in warm white and neutral white.
Payment, delivery and service
Payment is secure, delivery is tracked and returns are possible. Designix customer service answers questions on base, temperature or dimmer compatibility before purchase. First spot the base and the diameter, note the temperature you want, then confirm the wattage: these three pieces of information are enough to choose without getting it wrong.
