Choosing LED lighting without making a costly mistake: a practical guide for every room

Buying a new light may seem straightforward, until the fitting does not fit, the light is too bright or an outdoor lamp starts working less effectively after a few showers. With LED lighting, making the right choice is about more than just the wattage. The fitting, light colour, brightness, moisture protection and controls all affect whether a lamp is suitable for your home.

Pay particular attention to these three common pitfalls:

• Confusing wattage with brightness: a 5-watt LED bulb is not automatically dim or bright. Check the number of lumens.
• Buying the wrong fitting: E27, E14 and G9 fittings are not interchangeable. Check your existing bulb or fitting before ordering.
• Using outdoor lighting without the right protection: an LED lamp with IP20 is intended for dry indoor areas. For a garden, patio or driveway, choosing a suitable IP rating is important.

The most important specifications for LED lamps

1. Fitting: E27, E14 or G9

The fitting determines whether the lamp will physically fit your light fixture.

• E27 LED bulb: the wide screw fitting commonly found in ceiling lights, floor lamps and table lamps.
• E14 LED bulb: a narrower screw fitting, often used in chandeliers, wall lights and smaller fixtures.
• G9 LED bulb: a compact pin fitting for capsule or halogen bulbs. Check that the fixture is suitable for LED and that the dimensions match.

As well as the fitting, check the bulb’s diameter and height. A lamp may have the correct fitting technically, but still not fit beneath a shade.

2. Lumens and colour temperature

Lumens (lm) indicate how much light a lamp produces. For example, a Philips LED bulb with 470 lumens is suitable as a replacement for a traditional bulb with a similar light output. A reading lamp or work area may need more light, while a night light or decorative lighting may need less.

Colour temperature is expressed in Kelvin (K):

• 2700 K: warm white light for living rooms, bedrooms and dining rooms.
• 2800–3000 K: warm light for hallways, night lights and mood lighting.
• 4000 K and above: more neutral or cooler light, often used for workspaces.

Bear in mind that “40 W” or “100 W” on LED bulbs often refers to the light output of a traditional incandescent bulb. The actual energy consumption is lower. Always check the actual wattage, number of lumens and energy label.

3. Indoor, outdoor and controls

IP20 is commonly used for dry indoor areas. A bathroom, covered outdoor area or outdoor light requires a fixture with a suitable IP rating. The rating indicates protection against dust and water; a higher number is not automatically needed for every application.

Also consider how you want to control the lighting:

• Wall switch: simple and suitable for standard LED bulbs.
• Dimmable: only use with a suitable dimmer and a bulb that is explicitly marked as dimmable.
• Sensor: useful in a hallway, toilet, storage room or bedroom.
• Smart controls: practical if you want to adjust the colour temperature, brightness or schedules via an app.
• Solar: suitable for areas without a mains connection, but dependent on direct sunlight.

Our recommendations by user profile

Suitable for: Budget-conscious beginners

Philips LED Matte Bulb - 40 W - E27 - Warm White Light - 3-Pack

Why it suits this profile: This set is a straightforward choice for anyone looking to replace several standard indoor bulbs with warm LED lighting.

How this product avoids the pitfall

The E27 fitting, 2700 K colour temperature and 470 lumens per light point are clearly stated. The bulb is intended for indoor use and is not dimmable.

Key benefit & advantages

3 bulbs per pack, energy consumption of 4,9 W per bulb and a stated lifespan of 15.000 hours.

Suitable for: Buyers looking for top quality

Philips UltraEfficient LED Bulb, Transparent - 40W - E27 Base - Warm White Light, 2700K - Ultra Efficient: Energy Label A - 6-Pack

Why it suits this profile: Ideal for households that place a high value on the energy label and a long stated lifespan when making a purchase.

How this product avoids the pitfall

The product lists energy label A, 2700 K and 485 lumens. It is not dimmable, so check whether control via a wall switch is sufficient.

Key benefit & advantages

E27 fitting, 6 bulbs per pack and a manufacturer-stated lifespan of 50.000 hours.

Suitable for: Specific uses & intensive users

Huacan Solar Garden Lights 6 Pack Hollow-Carved IP65 Waterproof Outdoor Pathway Decor Warm White LED

Why it suits this profile: A practical choice for garden paths, flower beds, balconies or patios where you do not want to run cables to a mains socket.

How this product avoids the pitfall

The IP65 rating and stated outdoor use make the intended application clear. However, position the lights in a sunny spot; charging time and operating time depend on the weather.

Key benefit & advantages

6 lights, automatic switching on and off, a stated charging time of 4–6 hours and 5–8 hours of illumination after a full charge.

Suitable for: Specific uses & intensive users

2-pack energy-efficient night lights with light sensor, warm white

Why it suits this profile: Handy for hallways, children’s bedrooms or a toilet where you want automatic lighting without having to use a switch every time.

How this product avoids the pitfall

According to the product information, the sensor switches on at up to 20 lux and switches off in daylight. The lamp plugs into a socket and is not intended for damp areas.

Key benefit & advantages

0,3 W energy consumption, warm white light of 2800–3000 K, adjustable brightness from 10–100% and 20 lumens.

Practical buying tips for your home

• Measure the fitting and check the shape of the old bulb.
• For the living room, choose 2700 K in most cases if you want warm, atmospheric lighting.
• Compare lumens rather than looking at wattage alone.
• Check whether a bulb is dimmable before using it with a dimmer.
• Only use an outdoor lamp according to its stated application and IP rating.
• When buying a set of LED bulbs, check the number of bulbs included so that you do not buy too many or too few.
• Switch off the power before replacing a bulb. For ceiling lights, follow the installation instructions and, if in doubt, have fixed electrical installations carried out by a qualified electrician.

Frequently asked questions about LED lighting

How long do LED bulbs last?

The stated lifespan varies from product to product. The range includes, for example, LED bulbs rated for 15.000 hours and an UltraEfficient model rated for 50.000 hours. These are manufacturer product specifications; the actual lifespan depends, among other things, on usage, heat dissipation and whether the fixture is suitable.

Are LED bulbs cheaper to run?

LED bulbs generally use fewer watts for a similar light output than traditional incandescent or halogen bulbs. For a realistic estimate, compare the wattage, number of hours the bulb is used and your electricity tariff. According to Philips’ own information, certain models mentioned use around 80 to 90 per cent less energy than comparable traditional bulbs. This is a brand claim for the products concerned, not a general guarantee for every LED bulb.

Which LED lighting is suitable for a bedroom?

Warm white LED bulbs of around 2700–3000 K are often a good fit for a bedroom. A sensor night light can be useful in a hallway or for visiting the toilet during the night. If you want to create different lighting moods, choose a dimmable bulb or a smart LED ceiling light that supports these features according to the product description.