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Light Bulbs & Fluorescent Lights

What type of bulb and socket to choose? We will advise you.

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Socket

The base part of the bulb that connects to the lamp. There are several types of fittings:

E27

 27 mm in diameter, this is one of the most common fittings. It’s used by almost every light source with a voltage of 230 V, i.e. classic incandescent lamps, halogen, energy-saving, and LED bulbs. You can usually find this type in ceiling or wall lighting fixtures or chandeliers.

E14

 Has the same screw as E27, so once again, it’s used in classic incandescent lamps, halogen, energy-saving, and LED bulbs. They differ only in diameter, which in this case is 14 mm. The operating voltage is 230 V. Commonly used in smaller lamps, spot lights, and candelabra and chandeliers consisting of a large number of light bulbs.

GU10

 This slot has no screw. Instead, it has two pins with a diameter of 5 mm that you snap into the lamp and twist slightly. Its operating voltage is 230 V and this type is most commonly encountered in halogen or LED bulbs. It is used in ceiling lights, spot lights, or in bathroom and lavatory fixtures.

G4

 A threadless socket, it features two pins 4 mm apart that you snap into the lamp. Its operating voltage is 12V. Most commonly found in kitchen counter lighting fixtures, low ceilings, or bars.

GU5.3

 Another threadless socket, it features two pins 1 mm in diameter and spaced 5.3 mm apart. The socket is designed for 12V. The light source is usually a halogen or LED bulb. Mainly used in smaller lamps and spot lights.

G9

 A threadless socket similar to GU10. It has two pins that snap into the lamp. This is the smallest size for 230V halogen and LED bulbs. Most commonly used in ceiling fixtures, spot lights, or in bathroom and lavatory fixtures.

R7s

 A linear, tube-shaped socket inserted into a fork with a pitch of 78-189 mm. Its operating voltage is 230 V. Used in halogen spotlights, LED lamps, floor lamps, or architectural lighting fixtures.

Technology

Incandescent light bulbs

  • The cheapest light source when it comes to purchase cost. The massive heat loss, however, makes them very inefficient. Over 90% of the consumed energy is converted into heat and only the remaining 10% into light. Their service life is also low – 1,000 hours on average.

Halogen bulbs

  • About 30% more efficient than incandescent bulbs. Illuminate at the full power right after you switch them on, can be dimmed, and their purchase cost is lower than that of LED bulbs. Their operating costs are considerably higher, so they are mainly used in places where you need strong light for a short time. Their service life is 2,000 to 3,000 hours.

Energy-effcient light bulbs

  • Roughly 75% more efficient than incandescent bulbs. After switching, it takes a while before they reach their maximum brightness, so they aren’t suitable for places where lights are often turned on and off. Lose their original luminance after a few years. Their service life ranges between 6,000 and 20,000 hours.

LED bulbs

  • The latest and most efficient technology. Their service life is remarkable - usually between 20,000 and 50,000 hours. Achieve high brightness with minimum energy consumption. A 9W LED bulb is equivalent to a 60W halogen lamp.
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Alza Days LED Bulbs LED bulbs Light Bulbs & Fluorescent Lights Sorted by Socket by Socket Fluorescent Tube Lamps Fluorescent Tubes Smart Light Bulbs Light Sources Efficient Lamps Efficient Spotlight Bulbs Spotlight Oven Light Bulbs Oven Vintage & Retro Light Bulbs Retro Light Bulb Value Packs Value Packs Car Lightbulbs Car Bulbs AlzaPower Light Bulbs & Fluorescent Lights AlzaPower Jak vybrat žárovku
 
806 Results
EMOS LED Bulb Classic A60 10.5W E27 warm white - LED Bulb
4.6 25×
EMOS LED Bulb Classic A60 10.5W E27 warm white
LED Bulb - lamp cap E27, power input 10,7 W, 230 V, luminous flux 1060 lm, warm light (2700 K), diameter of 6 cm, lifespan 30000 h, energy label F, 3 in package - 2.49 €/pcs
7.48 €
Currently Unavailable
Order Code: EMS19027
WPro LFO Bulb 139 - Oven Bulb
4.5 29×
WPro LFO Bulb 139
Oven Bulb - E14 socket
4.59 €
Currently Unavailable
Order Code: WPRO081
WiZ Tunable White 50W GU10 - LED Bulb
4.1 8×
WiZ Tunable White 50W GU10
LED Bulb - smart, lamp cap GU10 - lamp cap GU10, power input 4,9 W, 230 V, luminous flux 400 lm, adjustable light temperature (2700-6500 K), WiFi 2,4 GHz, compatible with Samsung SmartThings, IFTTT, control via app in both Czech and English, lifespan 15000 h, energy label F, 1 piece in package
12.90 €
Currently Unavailable
Order Code: WiZ21011
OSRAM spiral LED bulb E27 4W VINTAGE 1906, warm white - LED Bulb
5.0 1×
OSRAM spiral LED bulb E27 4W VINTAGE 1906, warm white
LED Bulb - lamp cap E27, power input 4 W, luminous flux 140 lm, warm light (1800 K), lifespan 15000 h, energy label G, 1 piece in package
6.09 €
Currently Unavailable
Order Code: osra25022
RETLUX RLL 614 GU10 bulb 5W CW D - LED Bulb
6 variants
4.1 73×
RETLUX RLL 614 GU10 bulb 5W CW D
LED Bulb - lamp cap GU10, power input 5 W, 230 V, luminous flux 675 lm, neutral light (4000 K), lifespan 25000 h, energy label D, 1 piece in package
2.49 €
Currently Unavailable
Order Code: RTLX24042
RETLUX RLL 434 G45 E14 miniG 6W DL - LED Bulb
5.0 11×
RETLUX RLL 434 G45 E14 miniG 6W DL
LED Bulb - lamp cap E14, power input 6 W, 230 V, luminous flux 510 lm, cool light (6500 K), diameter of 4,5 cm, lifespan 25000 h, energy label F, 1 piece in package
2.89 €
Currently Unavailable
Order Code: RTLX17122
RETLUX REL 37 LED GU10 4x5W - LED Bulb
4.6 9×
RETLUX REL 37 LED GU10 4x5W
LED Bulb - lamp cap GU10, power input 5 W, 230 V, luminous flux 425 lm, diameter of 5 cm, lifespan 25000 h, energy label F, 4 in package
Buy with code ALZADNI15 The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Získajte zľavu 15 % s kódom ALZADNI15. Kliknite a kód sa uplatní automaticky. 5.26 €
6.19 €
On the way > 5 pcs
Expected 15/05/2026
Order Code: RTLX17137
WiZ Tunable White 60W E27 ST64 Filament - LED Bulb
5.0 3×
WiZ Tunable White 60W E27 ST64 Filament
LED Bulb - smart, lamp cap E27 - lamp cap E27, power input 6,7 W, 230 V, luminous flux 640 lm, adjustable light temperature (2000-5000 K), WiFi 2,4 GHz, compatible with Samsung SmartThings, IFTTT, control via app in both Czech and English, lifespan 15000 h, energy label E, 1 piece in package
14.90 €
Currently Unavailable
Order Code: WiZ21016
WiZ Tunable White 60W E27 G95 Filament - LED Bulb
3.3 3×
WiZ Tunable White 60W E27 G95 Filament
LED Bulb - smart, lamp cap E27 - lamp cap E27, power input 6,7 W, 230 V, luminous flux 806 lm, adjustable light temperature (2700-6500 K), WiFi 2,4 GHz, compatible with Samsung SmartThings, IFTTT, control via app in both Czech and English, lifespan 15000 h, energy label E, 1 piece in package
15.90 €
Currently Unavailable
Order Code: WiZ21018
EMOS Classic Mini Globe, E14, 4.2 W (40 W), 470 lm, cool white - LED Bulb
6 variants
4.8 97×
EMOS Classic Mini Globe, E14, 4.2 W (40 W), 470 lm, cool white
LED Bulb - lamp cap E14, power input 4,2 W, 230 V, luminous flux 470 lm, cool light (6500 K), diameter of 4,5 cm, lifespan 30000 h, energy label E, 1 piece in package
from  1.97 €
Currently Unavailable
Order Code: EMOS24110
Philips 40W P45 E14 4000K CL UE SRT4 - LED Bulb
5.0 2×
Philips 40W P45 E14 4000K CL UE SRT4
LED Bulb - lamp cap E14, power input 2,3 W, 230 V, luminous flux 485 lm, neutral light (4000 K), lifespan 50000 h, energy label A, 1 piece in package
8.39 €
Currently Unavailable
Order Code: PHLS25048
Philips LED 60W A60 E27 2700K CL UE SRT4 - LED Bulb
4.4 3×
Philips LED 60W A60 E27 2700K CL UE SRT4
LED Bulb - lamp cap E27, power input 4 W, 230 V, luminous flux 840 lm, warm light (2700 K), lifespan 50000 h, energy label A, 1 piece in package
11.90 €
Currently Unavailable
Order Code: PHLS25028
Tesla - LED bulb BULB E27, 8W, 230V, 806lm, 25 000h, 4000K daylight white, 220st 3pcs in pack - LED Bulb
10+ variants
4.8 213×
Tesla - LED bulb BULB E27, 8W, 230V, 806lm, 25 000h, 4000K daylight white, 220st 3pcs in pack
LED Bulb - lamp cap E27, power input 8 W, 230 V, luminous flux 806 lm, neutral light (4000 K), diameter of 6 cm, lifespan 25000 h, energy label F, 3 in package - 2.20 €/pcs
Buy with code ALZADNI15 The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Získajte zľavu 15 % s kódom ALZADNI15. Kliknite a kód sa uplatní automaticky. 5.60 €
6.59 €
Currently Unavailable
Order Code: TslLigh22_54
OSRAM SPC. T26/57, E14, 15W, 300 °C, clear - pack of 2 - Oven Bulb
5.0 2×
OSRAM SPC. T26/57, E14, 15W, 300 °C, clear - pack of 2
Oven Bulb - energy label G, power input 15 W, 230 V, Filament, luminous flux 85 lm, warm light (2700 K), diameter 2,6 cm, lifetime 1000 h, 2 pieces in the package
4.19 €
Currently Unavailable
Order Code: osra25113
Philips LED 60W G95 E27 4000K CL UE SRT4 - LED Bulb
4.3 3×
Philips LED 60W G95 E27 4000K CL UE SRT4
LED Bulb - lamp cap E27, power input 4 W, 230 V, luminous flux 840 lm, neutral light (4000 K), diameter of 9,5 cm, lifespan 50000 h, energy label A, 1 piece in package
11.90 €
Currently Unavailable
Order Code: PHLS25027
Nedis LED bulb, E14, G45, 2 W, 250 lm, 2700 K, retro - LED Bulb
5.0 3×
Nedis LED bulb, E14, G45, 2 W, 250 lm, 2700 K, retro
LED Bulb - lamp cap E14, power input 2 W, 230 V, luminous flux 250 lm, lifespan 15000 h, energy label E, 1 piece in package
3.19 €
Currently Unavailable
Order Code: Nedis24045
SMD LED Downlight GX53 11W/3000K/970Lm/230V - LED Bulb
2 colors
4.4 5×
SMD LED Downlight GX53 11W/3000K/970Lm/230V
LED Bulb - lamp cap GX53, power input 11 W, 230 V, luminous flux 970 lm, diameter of 2,8 cm, lifespan 30000 h, 1 piece in package
2.79 €
Currently Unavailable
Order Code: MPzar001
VOREL Bulb 400 W for halogen lamp 2 pcs - Bulb
3.5 2×
VOREL Bulb 400 W for halogen lamp 2 pcs
Bulb
4.26 €
Currently Unavailable
Order Code: CMP3133
Philips Hue White Ambiance 5.1W 12V MR16 1P EU - LED Bulb
2 variants
5.0 1×
Philips Hue White Ambiance 5.1W 12V MR16 1P EU
LED Bulb - smart, lamp cap GU5,3 - lamp cap GU5,3, power input 5,1 W, 12 V, luminous flux 400 lm, adjustable light temperature (2200-6500 K), diameter of 5 cm, Bluetooth, compatible with Apple Home, Philips Hue, control via app in both Czech and English, lifespan 25000 h, energy label G, 1 piece in package
41.90 €
Currently Unavailable
Order Code: PHLS23018
Wi-Fi BLE G95 E27 922-65 RGB CL 1PF/6 - LED Bulb
5.0 1×
Wi-Fi BLE G95 E27 922-65 RGB CL 1PF/6
LED Bulb - smart, lamp cap E27 - lamp cap E27, power input 6,3 W, 230 V, luminous flux 470 lm, adjustable light temperature (2200-6500 K), diameter of 9,5 cm, WiFi 2,4 GHz and WiFi 5 GHz, control via app in both Czech and English, lifespan 15000 h, energy label G, 1 piece in package
31.91 €
Currently Unavailable
Order Code: WiZ23019
Wi-Fi BLE ST64 E27 922-65 RGB CL 1PF/6 - LED Bulb
5.0 1×
Wi-Fi BLE ST64 E27 922-65 RGB CL 1PF/6
LED Bulb - smart, lamp cap E27 - lamp cap E27, power input 6,3 W, 230 V, luminous flux 470 lm, adjustable light temperature (2200-6500 K), diameter of 6,4 cm, WiFi 2,4 GHz and WiFi 5 GHz, control via app in both Czech and English, lifespan 15000 h, energy label G, 1 piece in package
31.91 €
Currently Unavailable
Order Code: WiZ23018
Nedis LED bulb, E27, A60, 8 W, 806 lm, 2700 K - LED Bulb
5.0 3×
Nedis LED bulb, E27, A60, 8 W, 806 lm, 2700 K
LED Bulb - lamp cap E27, power input 8 W, 230 V, luminous flux 806 lm, lifespan 15000 h, energy label F, 1 piece in package
3.89 €
Currently Unavailable
Order Code: Nedis24038
Philips LED 60W G95 E27 2700K CL UE SRT4 - LED Bulb
Philips LED 60W G95 E27 2700K CL UE SRT4
LED Bulb - lamp cap E27, power input 4 W, 230 V, luminous flux 840 lm, warm light (2700 K), diameter of 9,5 cm, lifespan 50000 h, energy label A, 1 piece in package
11.90 €
Currently Unavailable
Order Code: PHLS25026
Philips CorePro LEDspot ND 4.4-35W MR16 840 36D - LED Bulb
Philips CorePro LEDspot ND 4.4-35W MR16 840 36D
LED Bulb - lamp cap GU5,3, power input 4,4 W, 12 V, luminous flux 390 lm, neutral light (4000 K), diameter of 5 cm, lifespan 15000 h, energy label F, 1 piece in package
7.79 €
Currently Unavailable
Order Code: PHIzar001

Light Bulbs & Fluorescent Lights

Alza Days LED Bulbs LED bulbs Light Bulbs & Fluorescent Lights Sorted by Socket by Socket Fluorescent Tube Lamps Fluorescent Tubes Smart Light Bulbs Light Sources Efficient Lamps Efficient Spotlight Bulbs Spotlight Oven Light Bulbs Oven Vintage & Retro Light Bulbs Retro Light Bulb Value Packs Value Packs Car Lightbulbs Car Bulbs AlzaPower Light Bulbs & Fluorescent Lights AlzaPower Jak vybrat žárovku
 

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