LED Lamps & Bulbs for Every Fitting

Advantages of LED lamps

For a long time, LED technology suffered from a poor reputation: too expensive, too cold, not dimmable. Today, LED lamps have moved far beyond those early limitations and offer nothing but advantages over conventional light sources and incandescent bulbs.

• High energy efficiency: While conventional incandescent bulbs achieve around 10 lumens per watt, modern LED lamps reach 60 to 170 lm/W. Energy savings compared to incandescent bulbs can be as high as 90 %.
• Long service life: LEDs last an exceptionally long time. Maintenance and lamp replacement are not required for many years, even when luminaires are installed in hard-to-reach locations.
• Fast payback: The higher purchase cost compared to incandescent bulbs pays back quickly thanks to outstanding energy efficiency.
• Compact format: Low heat output and a compact design open up lighting concepts that were previously not possible, including slim LED panels, LED strips, and recessed spotlights in the smallest of luminaires.
• Versatility: LEDs are equally suited to general lighting and to hazardous locations or the illumination of sensitive objects, since they generate very little heat.
• Dimming and smart home: Many LED lamps are dimmable and can be integrated into smart home systems. Models with Tunable White also allow colour temperature adjustment via app or voice control.

Lumens not watts: the key to choosing the right LED

Anyone switching from incandescent bulbs to LED lamps tends to think in watts. With LED, however, watts measure energy consumption, not brightness. Brightness is measured in lumens (lm). As a guide for making the switch:

Fittings and caps: the most common types at a glance

For an LED lamp to fit the luminaire, the fitting must match. The most common fittings at a glance:

LED lamp shapes

LED lamps are available in all classic shapes, making a 1:1 replacement in existing luminaires straightforward in most cases:

• Bulb (A-shape): The classic incandescent shape with E27 or E14 fitting. Universally suited to ceiling lights, floor lamps, and table lamps.
• Globe: Spherical shape for decorative luminaires, chandeliers, and open pendant lights.
• Candle: Slim candle shape with E14 fitting, typical for chandeliers and wall lights.
• Reflector spot (GU10 / MR16): Directional spots for recessed spotlights and track lights.
• Tube (T5 / T8): Linear lamp tubes as a direct replacement for fluorescent lamps in offices, commercial, and industrial settings.
• Compact fluorescent lamp (CFL) replacement: Retrofit replacement for energy-saving lamps with plug-in fittings such as G24 or G23.
• Special shapes: Filament lamps, T-shape (T22, T30), or tubular lamps for specialist applications and designer luminaires.

Choosing the right colour temperature

Colour temperature in Kelvin (K) determines the mood of the light in a room. As a guide:

Models with Tunable White allow stepless colour temperature adjustment from warm white to daylight white via app or switch, replicating the natural course of daylight. They are frequently integrated into smart home systems such as Philips Hue or LEDVANCE SMART+.

Non-replaceable LEDs: what you need to know

Modern luminaires increasingly feature integrated LEDs that cannot be replaced individually. There are advantages and disadvantages to this:

• Advantage: Integrated LEDs are often more compact, more efficient, and designed to last the full lifetime of the luminaire with no maintenance required.
• Disadvantage: If the LED fails or the luminaire becomes outdated, the entire fitting must be replaced.

Anyone who prefers to keep their options open should choose luminaires with standard fittings (E27, GU10, etc.) and replaceable LED lamps.

Dimmable LED lamps and smart home

Many LED lamps are dimmable, but not all dimmers are compatible. Conventional phase-cut dimmers designed for incandescent bulbs are often unsuitable for LED lamps and can cause flickering or buzzing. When buying a dimmable LED lamp, look for:

• The "dimmable" designation in the technical specifications
• The manufacturer's compatibility list for suitable dimmers
• An LED-compatible dimmer from our range under Dimmers

For smart home use, LED lamps are available with Wi-Fi, Bluetooth, or Zigbee connectivity, controllable via app, voice assistant, or timer, without the need for a separate dimmer or actuator.

Buy LED lamps at WATT24

Our team of lighting experts is happy to help you find the right LED lamp. Our shop stocks only high-quality LED lamps from leading manufacturers such as Philips, LEDVANCE, and OSRAM.

Contact our lighting experts

FAQ: Frequently asked questions about LED lamps